Mathematics Questions and Answers September 30, 2020

Calculate the probability that 500 rolls of two regular 8-sided dice will include more than 50 sums of 7.

(d) Computation: Show the process of computation as indicated in the lecture note (show the 4 stages as we learned during the class). For Stage A, you must show the process for all items (including Items #4 and #5). Make sure to include the summary table (as shown below) as the last step: Source SS df MS F Between Within N/A Total (e) What is your

Can someone please help me get started with this? Choose TWO variables that you feel are correlated and explain why you feel that they are correlated. Do you suspect the relation is positive or negative? Why? Which would be considered the independent variable, which the dependent variable? Why? Run a regression analysis in Exceland provide the

A factory that manufactures bolts is performing a quality control experiment. Each object should have a length of no more than 16 centimeters. The factory believes that the length of the bolts exceeds this value and measures the length of 80 bolts. The sample mean bolt length was 16.06 centimeters. The population standard deviation is known to be

The ages of a sample of Canadian tourists flying from Toronto to Hong Kong were: 42, 7'8, 68, 7?, 7'8, 7'9, 51, 51, 39, 40 a. Compute the range. Range b. Compute the mean deviation- (Round the mean deviation to 2 decimal places.) Mean deviation |:| 1:. Compute the standard deviation. [Round the standard deviation to 2 decimal places.) Standard

Which of the following graphical methods cannot be used to summarize a quantitative dataset ? O a) bar graph ( b) histogram O c) dot plot O d) frequency table ( e) stem-and-leaf plot

NO EXCEL, SHOW CALCULATIONS 5) Umbro, one of the companies that makes soccer uniforms, has noticed that 45% of their customers request red uniforms, 35% request blue uniforms and the rest request some other colour. Among those requesting red uniforms, 60% also request player numbers on the sleeves while only 40% of the other customers do

Start Four spinners are turned. Spinner 1 has results {1,2,3} Spinner 2 has results {1,2,3,4,5,6,7,8} Spinner 3 has results {1,2,3,4,5,6,7,8} Spinner 4 has results {1,2,3,4,5} The results for every spinner are similarly likely. S is the amount of the numbers that surface on the spinners. What is the normal estimation of S? E|S| = ____ Bill fights

Leanne has constructed a Multiple regression model and wants to test some assumptions of his regression model. In particular, she is testlng for nermallty or the residuals. To do this Leanne should: plot the residuals vs the observed values of the response variable and check if it forms and upward sloping line

Determine the 80% confidence interval estimate for the population mean of a normal distribution given n = 144, 6 = 117, and x = 1,300. The 80% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.)

The Lazer Company has a contract to produce a part for Boeing... The Lazer Company has a contract to produce a part for Boeing Corporation that must have an average diameter of 6 inches and a standard deviation of 0.10 inch. The Lazer Company has developed a process that will meet the specifications with respect to the standard deviation, but it

7.EOC.52-E Question Help V a The average starting salary for an MBA graduate in the class of 2018 was $120,000. Assume the population standard deviation for starting MBA salaries was $16,000. A random sample of 50 MBA graduates from the class of 2018 was selected. a. What is the probability that the sample mean is less than $124,000? b. What is

Activity Use the information in table 1 of thelife table at the bottom of the page to answer these questions. Question 1 What is the probability of dying between ages 70 and 71? Question 2 How many people out of 100,000 will survive until age 90? Question 3 How many people out of every 100,000 will die between ages 99 and 100? Question 4 How many

A Game Three understudies are playing a game. They choose to pick the principal individual to play by each choosing a card from the 52-card deck and searching for the most elevated card in worth and suit. They rank the suits from most minimal to most noteworthy: clubs, precious stones, hearts, and spades. a. On the off chance that the card is

1. Consider the probability space (R+, B(R+), P) , where R+ = (0, 00) and P is the Gamma(2, 3) distribution, dP(x) = gxe-3 dx. Consider the random variables n +1 n+1 fn(20) = , TERA, nEN. n2 exp n Using the dominated convergence theorem, prove that the limit lim E(fn) exists and find it. [9 Marks]

[3.03/9.09 Points] DETAILS PREVIOUS ANSWERS DEVORESTAT9 9.E.036.S. MY NOTES ASK YOUR TEACHER PRACTICE A Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded condition and an abraded condition. Use the paired t test to test Ho: (p = 0 versus Ha: Mp > 0 at significance level 0.01. (Use HD = Hu -

1- The real estate company of Kuhlman and Associates has five sales people. Listed below is the number of homes sold last month by each of the five associates. Bruce Kuhlman, the owner, wants to estimate the population mean number of homes sold based on samples of three. AssociateNumber of Homes Sold A. Sue Klaus6 B. John Bardo2 C. Jean Cannon5 D.

I forgot to ask does it matter that they rated each promotion on a scale from 1-4? I'm trying to find out which test to conduct on the following question is there a relationship between age and the type of promotion when ordering fast food? Ho: There is no relationship between age and type of promotions when ordering fast food. Ha: There a

The Hoylake Rescue Squad receives an emergency call every 1, 2, 3, 4, 5, or 6 hours, according to the following probability distribution. The squad is on duty 24 hours per day, 7 days per week: Time Between Emergency Calls (hr.) 1 2 3 4 5 6 Probability 0.15 0.10 0.20 0.25 0.20 0.10 1.00 a. Simulate the emergency calls for 3 days (note that this

4. The following calculator display presents the results of a hypothesis test. Based on this display, answer the questions that follow: T-Test IN 12 467816 NWWOHO UXIT+ 00 a) Is this a hypothesis test for a population proportion or a population mean? b) State the null and alternative hypotheses. c) What is the sample size? d) What is the value of

Endurance Times Altman and Dull report the endurance limes for patients with dynamic hepatitis, half treated with prednisone and half accepting no treatment.23 The information that follow are adjusted from their information for those treated with prednisone. The endurance times are recorded to the closest month: 8 127 11 133 52 139 57 142 65 144

Hi, Someone helped me on this question yet I still got it wrong can anyone help me with this. Thanks! When you are done, click here to see a summary of your score Question with last attempt is displayed for your review only Final exam scores in a Math class with large number of students have mean 155 and standard deviation 4.9. Provided the scores

Are most student government leaders extroverts? According to Myers-Briggs estimates, about 82% of college student government leaders are extroverts.Suppose that a Myers-Briggs personality preference test was given to a random sample of74student government leaders attending a large national leadership conference and that54were found to be

A marketing survey is conducted in which students are to taste two different brands of soft drink. Their task is to correctly identify the brand tasted. A random sample of 200 students is taken. Assume that the students have no ability to distinguish between the two brands. Answer from a previous question in this problem ----> the probability that

Secure Spearman rank-order correlations for the largest Pearson coefficient in the matrix. Explain the differences between the two findings. Forbes 500 Random Subsample ($, millions) Number of Employees Assets Sales Market Value Net Profit Cash Flow (thousands) 1.034.00 1,510.00 697.00 82.60 126.50 16.60 956.00 785.00 1,271.00 89100 191.20 5.00

The following data represents the age of 30 lottery winners. 20 25 27 27 28 28 35 41 43 44 44 46 49 54 54 56 58 59 59 60 60 61 62 64 65 67 68 70 72 81 Complete the frequency distribution for the data. Age Frequency 20-29 30-39 40-49 50-59 60-69 70-79 80-89

NO EXCEL, SHOW CALCULATIONS 3) Although smoking has diminished in recent years, it is still problematic in the prison population. In an effort to reduce smoking among prisoners, a psychologist decided to evaluate two different treatments. In one, smokers heard a detailed explanation about the effects of cigarette smoke on the human body,

***there are three excel columns written out below: sales Per Capita, Advertising Exp per Capita, and avg local income. Just need to copy/paste The data in the file attached contains information on your firm's sales per capita, advertising expenditure per capita, and average local income. Regress sales per capita on advertising expenditure per

Calculate the five-number summary of the given data. Use the approximation method. 24,17,8,4,15,23,18,19,15,21,8,1,24,10,24 Enter your answers in ascending order, separating each answer with a comma.

Hi, Someone helped me on this question yet I still got it wrong can anyone help me with this. Thanks! Reattempt last question below, or select another question Salaries for senior Civil engineers per year have known mean of 74 K dollars and standard deviation 2.5 K dollars. Provided that the salaries per year for senior Civil engineers have a

Rhino viruses typically cause common colds. In a test of the effectiveness ofechinacea, 38 of the 43 subjects treated with echinacea developed rhinovirus infections. In a placebogroup, 77 of the 94 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections.

I have included a photo of the chart and question 10.(15pts) The manager of a used car lot took inventory of the automobiles on his lot and constructed the following table based on the age of his car and its make (foreign or domestic). Age of Car (in years) Make 0-2 3-5 6 - 10 over 10 Total Foreign 37 28 13 22 Domestic 35 21 14 30 Total a. A car

A large grocery store chain believes that 73% of its customers use the store's "Savings Card" when they make purchases. The manager in charge of the "Savings Card" program has randomly sampled 24 customers and observed whether or not they used the card. Complete parts a through c. . . .. . a. Assuming that the 73% use rate is correct, what is the

You conduct a study in which you compare the blood pressure of three groups of people diagnosed with hypertension, one group taking a standard blood pressure medication, one group taking a new treatment, and a third group assigned to a strict diet and exercise protocol. The patients were allowed to choose which treatment they wanted to try. You

Consider the following hypotheses. H0: p0.13 H1: p>0.13 Given that p=0.18, n=150, and =0.05, answer the following questions. a. What conclusion should bedrawn? b. Determine thep-value for this test. a. Determine the criticalvalue(s) of the test statistic. z= nothing (Use a comma to separate answers as needed. Round to three decimal places

Arrivals to a bank automated teller machine (ATM) are distributed according to a Poisson distribution with a mean equal to four per 15 minutes. Complete parts a and b below. a. Determine the probability that in a given 15-minute segment, two customers will arrive at the ATM. The probability is 0.1465 (Round to four decimal places as needed.) b.

Worldwide Baccalaureate Secondary school understudies in a Global Baccalaureate (IB) program are set in sped up or progressed courses and should take IB assessments in every one of six branches of knowledge toward the finish of their lesser or senior year. Understudies are scored on a size of 1-7, with 1-2 being poor, 3 fair, 4 normal, and 5-7

Activity 102 Comparing Frequency Polygons we xant to compare or more groups on some measurement. One way to do this effectively to use frequency polygons plotted on dae mne graph Look at Figure 10.2 belouz It illutrates a study in which two foulth grade clases were compared one m hich a new ocial studies curriculum was being fried out and a

(08.03 MC) The dot plots below show the ages of students belonging to two groups of salsa classes: ..... Group A ...... ..... .... Group B 5 10 15 20 25 30 Age of Salsa Students (in years) Based on visual inspection, which group most likely has a lower mean age of salsa students? Explain your answer using two or three sentences. Make sure to use

Solve pleaseee Consider a series of events. (a) How does a tree diagram help you list all the possible outcomes of a series of events? All possible outcomes are shown as distinct paths from the beginning of the diagram to the end of each last branch. O All possible outcomes are shown as distinct paths along every individual branch. O All possible

Dixie Coffee Shop sells two basic blends: RexNorth and CrustMont. They use two types of coffee to produce the blends: Brutte and Santos. Let cj represent pounds of coffee i in blend j i = B, S (for Brutte and Santos respectively) j = R, C (for RexNorth and CrustMont respectively) The shop has 130 pounds of Santos available. Input the coefficients

I have included the data chart 10.(15pts) The manager of a used car lot took inventory of the automobiles on his lot and constructed the following table based on the age of his car and its make (foreign or domestic). Age of Car (in years) Make 10- 2 3 - 5 6 - 10 over 10 Total Foreign 37 28 13 22 Domestic 35 21 14 30 Total what is the

Question 5 (1 point) Listen The flight time of an airplane traveling from Atlanta to Los Angles has a uniform probability distribution with the smallest flight time equal to 270 minutes and the largest flight time equal to 300 minutes. What is the probability the flight time for traveling from Atlanta to Los Angles will be between 280 minutes and

Consider composing onto a PC plate and afterward sending it through a certifier that tallies the quantity of missing heartbeats. Assume this number X has a Poisson circulation with boundary = 0.9. (Round your responses to three decimal spots.) (a) What is the likelihood that a circle has precisely one missing heartbeat? (b) What is the likelihood

Please explain Committee: The Student Council at a certain school has nine members. Four members will form an executive committee consisting of a president, a vice president, a secretary, and a treasurer. (a) In how many ways can these four positions be filled? (b) In how many ways can four people be chosen for the executive committee if it does

Math 240 Jump to level 1 A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained

Microeconomics Help! (ECO/365T) In the following question you are asked to determine, other things equal, the effects of a given change in a determinant of demand or supply for product X upon (1) the demand (D) for, or supply (S) of, X; (2) the equilibrium price (P) of X; and (3) the equilibrium quantity (Q) of X. A decrease in the price of a

Based on these results, t(4 0)= 1.59, p = .24, 2 = . 010, what can the educational researcher say about the null hypothesis?

sample distribution Use a I-lost to test the claim about the population mean p at the given level of significance a using the given sample statistics. Assume the population is normally distributed Claim =51,300, a =0.05 Sample statistics: x =51,876, s =2800, n = 15 Click the icon to view the t-distribution table The standardized test statistic is

Which mascot should be chosen? A new college needs to pick a mascot for its football team. The students were asked to rank four choices in order of preference; the results are tallied below. Rankings Bulldog 3 4 4 1 3 Panther 2 1 2 4 2 Hornet 4 2 1 2 4 Bobcat 1 3 3 3 1 Number of votes: 626 410 383 586 890 Using the pairwise comparison method of

7) (10 points) Given the histogram below, write a few sentences describing the shape, center and spread of the distribution. Are there any outliers? 24 8) (5 points each) Comment on the strength, form and direction of the associations in these three scatterplots. .. 9) (5 points) If you had to guess the correlation coefficient of each of the

Four women and three men are to be arranged in a straight line for a photo. How many possible arrangements are there if the third person in the line must be a woman?

Let the vector A be distributed jointly Normal. Let A B B have non - singular covariance matrix > = Z Note that the divisions in the covariance matrix (>) reflect the division of the vector in A and B. Also assume that E [A] = E[B] = 0. Show that E [Y X] = YX-1A

..3 Answer the following questions Question 1. Independent flips of a coin that lands on heads with probability p are made. What is the probability that the first four outcomes are (a) H,H, H,H? (b) T, H,H,H? Question 2. Eight bits are transmitted across a lossy wireless link. Each bit is corrupted independently with probability p. (a) What is the

The senior supervisor, advertising chief, and 3 different representatives of Company An are facilitating a visit by the VP and 2 different workers of Company B. The eight individuals line up in an irregular request to snap a picture. Each method of arranging individuals is similarly likely. (a) What is the likelihood that the senior supervisor is

Political race 2008 Throughout the spring of 2006 the news media were at that point gathering information that followed the fortunes of the significant up-and-comers wanting to turn into the leader of the US. One such survey directed by Monetary Elements showed the accompanying results:1 - Thinking ahead to the following official political

An insurance agency has arranged the going with information relating the time of drivers and the mishap rate (the likelihood of being engaged with a mishap during a 1-year duration) for drivers inside that bunch. Age Group Insured Drivers (%) Accident Rate (%) Under 25 16 6.5 25-44 40 1.5 45-64 30 2 65 and over 14 4 What is the likelihood of the

Clarissa has just completed her second semester in college. She earned a grade of C in her 2-hour linearalgebra course, a grade of A in her 3-hour sociology course, a grade of D in her 1-hour physics course, and a grade of C in her 1-hour creativewriting course. Assuming that A equals 4points, B equals 3points, C equals 2points, D equals 1point,

Activity 10.8 Preparing a 5number Summary Listed are percentages ofteachers who are filly credentialed. In ffis actlvior will consuct a number summar, for the percentage of teachers who are filly credentialed for each county in the state of Callfomia as published in the San Luts Obispo Tribune (7292001 ) and shown m the table below. ATE Butte

1. Let X and Y be two jointly continuous random variables with joint pdf: f(x, p)- xy, 0

Let X and Y be two jointly continuous random variables With joint pdf b. O, otherwise the conditional pdf (X ly). Find the probability Yof). Determine Whether X and Y are

ACCT9403 Section 2 Rugambwa Ntwall Jean-Luc 2 | 08/12/215:31 PM Test: Test 1 Question 17 This Test: 42 pts possible Submit Test (Measuring risk and rates of return) a. Given the holding-period returns shown in the popup window, , compute the average returns and the standard deviations for the Zemin Corporation and for the market. b. If Zemin's

please help The accompanying data table shows the level of social media networking (measured as the percent of individuals polled who use social networking sites) and the GDP at purchasing power parity (PPP) per capita for each of 24 selected countries. 3. Compute the covariance. 1). Compute the coelcient of correlation, c. Based on parts (a) and

Question 15 4 / 4 pts How many pounds of carbon dioxide would you prevent from entering the atmosphere in one year, if you were to replace a 100-watt light bulb with a CFL bulb that uses 28 watts in a fixture that you have on 7 hours per day? Round your answer to the nearest tenth of a pound. Do not include units with your answer. 252 252.0 margin

Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and the profits (in millions of dollars). Determine if there is a significant positive linear correlation between advertising cost and profit . Use a significance level of 0.05 and round all values to 4 decimal places. Advertising Cost Profit 3 26 4 29

Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the hospital. Do patients at rural hospitals have a higher waiting time? The 13 randomly selected patients who went to the emergency room at rural hospitals waited an average of 6 hours to be admitted into the hospital. The standard deviation for these

Data in Perspective. Use these data to help answer the following questions: 9. About how often (once every x minutes or x seconds) on average is a person killed in a car crash in the United States? How often is a person injured in a car crash. About once every 13 minutes; about every 7 seconds 11. use the given data on the societal cost of crashes

A class with n kids lines up for break. The request in which the children line up is arbitrary with each requesting being similarly likely. There are three children in the class named John, Betty, and Mary. The utilization of "or" in the depiction of the occasions, ought to be deciphered as the comprehensive or. That is "An or B" implies that An

Run Crew Session 3 - weimy.m.. Content Voice Journal week 13 - Google.. WA Ch13Part1Spr2021 - STAT-1100.. LA SALT: Statistical Analysis and L. C Chegg - Get 24/7 Homework H.. Need Help? Read It Watch It [0.56/1.68 Points] DETAILS PREVIOUS ANSWERS UHSTAT5 13.E.026.S. MY NOTES PRACTICE ANOTHER An earlier exercise posed the following research

You are given that R squared = 0.358 What is the correlation coefficient What is the coefficient of determination? Round to three decimal places.

Given the discrete probability distribution shown to the right, X P(x) a. Calculate the expected value of x. 150 0.15 b. Calculate the variance of x. 175 0.20 c. Calculate the standard deviation of x. 200 0.65 a. E(X) = (Type an integer or a decimal.) b. o (Type an integer or a decimal.) C. 6. = (Type an integer or decimal rounded to two decimal

Q1) Calculate trend values by the method of least-squares from the data given below: Years 2004 2005 2006 2007 2008 2009 2010 Sales 125 128 133 135 140 141 143

IfA andB are independent events withP(A)=0.9 andP(B)=0.6 findP(AANDB).

1.A random sample of 126 observations produced a sample mean of 32. Find the critical and observed values of z for the following test of hypothesis using=0.01. The population standard deviation is known to be 5 and the population distribution is normal. H0:=28 versusH1:28. Round your answers to two decimal places. 2.A random sample of 112

slope intercept and regression equation shop. 1500 1000 Total expenses (in dollars) 500 0 20 40 60 80 100 120 140 160 180 200 220 Number of coffee drinks The slope of the line is Ex: 0.2 The intercept of the line is 10 The regression equation is Y = + X

For the givensample, the probability of a sample mean being less than 12,748 or greater than 12,751 is 0.5 Would the given sample mean be consideredunusual? A. The sample mean would not be considered unusual because there is a probability less than 0.05 of the sample mean being within this range. B. The sample mean would be considered unusual

Suppose that the consumer price index(CPI), which measures the cost of a typical package of consumergoods, stood at 137.4 in 1990 and 177.4 in 2000. Let x=0 correspond to1990, and estimate the CPI in 1998 and 2001. (Assume that the data can be modeled by a straightline.) Which linear equation best models theCPI? A. y=4x+137.4 B. y= 4x137.4 C. y=

A. State null and alternative hypothesisB. Identify Iv and DvC. Solve t-test for dependent samples 2. A researcher studies the effect of drug (MAO inhibitor) on the number of nightmares occurring in veterans with post-traumatic stress disorder. A sample of PTSD clients records each incident of nightmare fro I month before treatembnt. Participants

65. A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt workingclass people the most, since hey commute the farthest to work Suppose that the group randomly sunved 24 individuals and asked them their daily oneway commuting mileage. Tne results are in Table 13.22. Using a 5 significance level, test

r7 ,7 ' 1' r '-..f x r / u' / Question 2: Descriptive Statistics: The following data 13 number of days BctWecn the rst dose and the second dose ofCOVlD19 vaccination of 27 individuals in Kuwalt Replace A, B, C and D with your ID related values as explained above. This question must be done by hand calculation and not using Minitah or any other

Student Support Counting principles Faculty Support HCC Lerary + 3.3.1 Counting principles Due Monday, Mar 9, 11:59pm EDT Courting with combinations Question In a board game, each player selects 4 different tokens from 16 to start the game. How many different ways are there to select 4 tokens without repetition? Provide your answer below: MORE

Use a sample size that keeps both n's Use a significance level of 0.05 Task: Collect real data for your sample items. Remember they need to be something in a sequence, with 2 outcomes. Determine if the Project #4 Use a sample size that keeps both n's

(b) In order to train two SVM classifiers by using linear and RBF kernels respectively, what hyperparameters need to be optimised Explain the meaning of those hyper parameters. (4 marks)

In the following multiple regression model, TimeSpent=Bo+B1 athletes+32 nonathleteste where TimeSpent = time spent studying for the final exam athletes = a binary variable which equals to 1 for athletes, 0 for non-athletes nonathletes = a binary variable which equals to 1 for non-athletes, 0 for athletes If athletes spend more time studying for

What are the six assumptions required for reliable application of multiple linear regression?For two of the six assumptions you list, specify a way of evaluating the assumption (testing whether it holds in a particular problem). #1 #2 #3 #4 #5 #6

Please reply with a thorough explanation and answers, will rate quickly: I put the values in the the binomial distribution function in excel and then subtracted the value from one since it is 1 or more. Also how do I do the other questions? You may need to use the appropriate appendix table or technology to answer this question. Consider a

Help E and F are mutually exclusive events. P(E) = 0.2; P(F) = 0.5. Find P(E|F). (Enter your answer to one decimal place.) P(E F) = Show My Work (Optional)

A normal distribution has=26and= 5. (a)Find the z score corresponding to x =21. (Enter an exact number.) (b)Find the z score corresponding to x =38. (Enter a number.) (c)Find the raw score corresponding to z =3. (Enter an exact number.) (d)Find the raw score corresponding to z =1.3. (Enter a number.)

I have included the chart 10.(15pts) The manager of a used car lot took inventory of the automobiles on his lot and constructed the following table based on the age of his car and its make (foreign or domestic). Age of Car (in years) Make 10- 2 3 - 5 6 - 10 over 10 Total Foreign 37 28 13 22 Domestic 35 21 14 30 Total what is the

Can you help me with this one please? kindly show solutions also. thank youu. PLEASEEEEEE THIS IS JUST AN ASSIGNMENT PLEASEEE IT WAS A PT BUT OUR TEACHER TOLD US IT IS AN ASSIGNMENT ONLY. SO PLEASEEEE DO HELP ME 21. Given: n=25, 99% confidence level. Determine the t-value. a. 2.807 b. 2.797 c. 2.787 d. 2.779 22. .F'(Irm325

U.S. Birth Death Rates. In 2015, the U.S. population was about 321 million. The overall birth rate was 12.5 births per 1,000 people, and the overall death rate was 8.4 deaths per 1,000 people. a.Approximately births were there in the U.S. in 2015? 4.01 million births b.About how many deaths were there in the United States in that year? 2.70

Question 18 of 20 (1 point) | Question Attempt: 1 of 1 Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly is 115 millimeters of mercury (mmlig), but she believes that the actual value is higher. She bases her belief on a recently reported study of 12 randomly selected, elderly adults. The sample mean

stats 119 Assume that random guesses are made for eight multiple choice questions on an SAT test. so that there are n = B trials1 each with probabililyof success (correct) given by p = 0.2. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4. P(x

You want to know how wall color affects productivity, so you've painted 30 office rooms yellow and 24 blue. You've found that 10 employees in the yellow offices and 8 employees in the blue offices are highly productive. What is the probability of high productivity given a yellow office?

6)c)would a score of 40 unusual? Why or why not? 5) (10 points) Below is a frequency table comparing gender to left- or right-handedness. Would you say that there is some relationship between gender and handedness? Are the variables independent? 6) Let's say that I collected all past scores on a particular exam (which was graded out of 100

Given an independent variable x and a dependent variable y , a valid regression model can be built by: a)Taking the logarithms of neither x nor y . b)Taking the logarithms of both x and y . c)Taking the logarithm of y but not x . d)Taking the logarithm of x but not y . e)All of the above are possible. Correct choice is _________.

I need help with solving this practice problem. If you could provide an elementary explanation. That would be helpful in understanding the problem. 1. The service manager for a new automobile dealership reviewed dealership records of the past 20 sales of new cars to determine the number of warranty repairs he will be called on to perform in the

Hello, can someone help me solve this problem. Recently, a random sample of 25-34 year olds wasasked, "How much do you currently have insavings, not including retirementsavings?" The data in the table represent the responses to the survey. Approximate the mean and standard deviation amount of savings. The sample mean amount of savings is $ (Round

Dangerous Waste How safe is your area? Are there any unsafe waste locales close by? The table shows the quantity of dangerous waste destinations in every one of the 50 states and the Area of Columbia in the year 2006:5 AL 15 Hey 3 Mama 33 NM 13 SD 2 AK 6 ID 01 MI 68 NY 87 TN 14 AZ 9 IL 48 MN 24 NC 31 TX 44 AR 10 Of every 30 MS 5 ND 0 UT 18 CA 95

State the measurement scale for each. a.) Temperature in degrees Celsius b.) Ice cream flavors available c.) Pain levels on a scale from 1 to 10, 10 being the worst pain ever d.) Salary of employees

QZ3_HYPO1 1.The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. The ship building association wishes to find out whether their welders earn more or less than $20,000 annually. The alternate hypothesis is that the mean is not $20,000. If the level of significance