S
  1. study help
  2. subject categories
  3. sciences
  4. mathematics
  5. march 2023
  6. 29

Mathematics Questions and Answers March 29, 2023

Expert-verified solutions to help you succeed

e... sawwwuw ....4 Chapter 7 (2) HW Note 1: For all these problems, please follow the 5 step hypothesis testing procedure as explained in the textbook. The five steps are as follows: Step I: Set up hypothesis and determine the level of significance Step 2: Select appropriate test statistic Step 3: Set up the decision rule Step 4: Compute the test

Exercise 7.9 Suppose that we take a random sample of size n from a population having a mean (m) and standard deviation (s). For each of the following cases find the mean, variance and standard deviation of the sampling distribution of the sample mean : a.m = 500, s = 0.5 and n = 100 b.m = 10, s = 2 and n = 30

Technology is needed to complete the question. Thank you in advance The following table shows the selling price, in thousands of dollars, and the square footage of eight randomly selected houses recently sold by a real estate company. Determine the sample correlation coefficient between a house's sel ing price and its square footage. a Click the
image text in transcribed

A binomial experiment consists of 2 independent trials.The probability of success in each trial is 0.13.Give the standard deviation of the random variable associated with this experiment.

Bivariate data obtained for the paired variables x and y are shown below, in the table labelled "Sample data." These data are plotted in the scatter plot in Figure 1, which also displays the least-squares regression line for the data. The equation for this line is ?= 6.84-1.16x. In the "Calculations" table are calculations involving the observed y

Find the maximum area of a rectangle inscribed in the region bounded by the graph of y =3 x 2+ x and the axes.(Round your answer to four decimal places.)

The normal distribution is an example of a continuous probability distribution. Consider situations in your work or home that could be addressed through a continuous probability distribution. Describe the situation and the variables, and determine whether the variables are normally distributed or not. How could you change these to a normally

This years water pollution readings at State Park Beach seem to be lower than last year. A sample of 30 readings was randomly selected from this years daily readings: 3.63.93.33.43.83.73.53.63.73.6 3.63.73.93.83.74.03.73.53.83.6 3.53.63.53.73.63.93.93.73.63.5 Researchers want to know if this is sufficient evidence to conclude that the mean of this

Oneseason, the average little league baseball game averaged 2 hours and 41 minutes (161 minutes) to complete. Assume the length of games follows the normal distribution with a standard deviation of 17 minutes. Complete parts a through d below. a. What is the probability that a randomly selected game will be completed in less than 140 minutes?

Please help \f
image text in transcribed

A random sample of 40 adults with no children under the age of 18 years results in a mean daily leisure time of 5.37 hours, with a standard deviation of 2.29 hours. A random sample of 40 adults with children under the age of 18 results in a mean daily leisure time of 4.01 hours, with a standard deviation of 1.57 hours. Construct and interpret a

Spreadsheet models are referred to as what-if models because they: A.have specialized functions to perform detailed analysis B.come preloaded on computers C.are mathematical and logic-based models D.allow easy instantaneous recalculation for a change in model inputs I answered C , just want to verify my answer

(1 point) Use Simpson's Rule and all the data in the following table to estimate the value of f__1160 y dx. x 16 15 14 13 12 1110 y 0 3 9 9 1 9 5

If G is abelian, prove that G/H must also be abelian.

8. for a sample of n=25 scores, what is the value of the population standard deviation (o) necessary to produce each of the following a standard error values? a. Om= 10 points? b. Om = 5 points? c. Om = 2 points?

\f
image text in transcribed

i have 9 questions that are already were answered i just want to understand how each question were answered like do simple steps just to let me understand. thanks Quiltfnn 1 II I I. point Suppose the Federal Aviation Administration (FAA) would like to compare the ontime performances of different airlines on domestic, nonstop ights. To determine if
image text in transcribedimage text in transcribedimage text in transcribed

Could you please explain and help me solve this homework problem.. the sooner the better :-) If possible I would like to finish up in the next two hours.. show work:) The observed seatbelt use for San Diego County was 81%. A researcher surveyed a sample of 5,388 residents in Arkansas and found that 4,518 wore their seat belts.Is the percentage of

Hi--Can I get some assist with the following question (attached)? I have an assignment due shortly and am having trouble. Thank you so much for your help! \f
image text in transcribed

Could I get some help with this Make scatter diagram. Be sure to include axis titles on your graph and a trend line with the equation. Calculate the sample covariance and sample correlation coefficient. Discuss the results of the correlation coefficient and scatter diagram. Is there a possible relationship between the number of promotions and
image text in transcribed

Suppose that the known standard deviation for the numbers of hours that students work in a week is 14.9. If I draw a sample of 29 what is the standard error? SHOW WORK!!!

Please look this over: If you can let me know if I have given the correct response: Assume that the following has a linear cost function. Find the costfunction, C(x), revenuefunction, R(x), and profitfunction, P(x), where x is the number of items produced(or sold). Fixed Cost = $300 Marginal Cost = $18 Item Cost = 30 C(x) = 30(x)+300 R(x) = 30*100

A new roller coaster at an amusement park requires individuals to be at least4' 8" ( 56 inches) tall to ride. It is estimated that the heights of10-year-old boys are normally distributed with =55.0 inches and =4 inches. What proportion of10-year-old boys is tall enough to ride thecoaster?

Nationally, about 11% of the total U.S. wheat crop is destroyed each year by hail.An insurance company is studying wheat hail damage claims in a county in Colorado. A random sample of 16 claims in the county reported the percentage of their wheat lost to hail.17 9 10 9 12 19 15 13 9 12 23 18 14 11 12 5 The sample mean isx=13.0%. Let x be a random

Identify the sampling method & explain selection of participants or relevant sample - known population, characteristic selection strategy describe and justify the sampling method and minimum sample size quantitative studies include probabilistic selection approach and of supporting power analysis for statistical significance of responses. When

A chi-square test for independence has df = 2.What is the total number of categories (cells in the matrix) that were used to classify individuals in the sample?

5.Find the critical value (or values) for the t test for each. a.n = 10, = 0.05, right-tailed b.n = 18, = 0.10, two-tailed c.n = 6, = 0.01, left-tailed d.n = 9, = 0.025, right-tailed e.n = 15, = 0.05, two-tailed

Assume monthly sales (12 months/yr) are recorded for 7 years. Data has seasonality and trend. Trend equation was computed using total annual sales as the dependent variable (Y). The independent variable (X) used in creating the trend equation was Time (i.e., years 1 to 7). Trend equation computed is: Y = 1200 + 28*Time. We also found monthly

Can you provide a solution of the network diagram data that is given below? There are 9 units on each table. I was not able to add table here so providing units with comma. Activity:A ,B, C, D, E, F, G, H, I Initial Node: 1, 1, 3, 2, 2, 3, 3, 4, 5 Final Node:2, 3, 2, 4, 5, 4, 5, 6, 6 Estimated Duration: 3, 2, 2, 3, 3, 2, 1, 2, 4 The paths of the

A corporation must appoint a president, chief executive officer (CEO), chief operating office (COO) and chief financial office(CFO). It must also appoint a planning committee with three diferent members. There are 11 qualified candidates and officers can also serve on the committee. Complete parts a thru c below a. How many different ways can te

Show your work so we know how you got the answer. A novel had more than 500 pages. A random sample of 25 pages of the novel was taken, and the number of words on each page counted. The mean number of words for the sample was 323 words. and the standard deviation was 38.4 words. Calculate 80% confidence limits for the mean number of words for the

Using the "airport service times" data, can the airline claim that its service time is less than 2.5 minutes at a significance level of alpha = .05? Select one: a. No, analysis of the sample does not support their assertion. b. Yes, analysis of the sample supports their assertion.

Estimate the minimum sample size needed to achieve the margin of error=0.005

Scoops, a local ice cream parlor, has a choice of 20 ice cream flavors, 11 different candy toppings, 10 different liquid toppings (caramel, hot fudge, etc.) , and 5 different types of nuts.Suppose you select a single scoop sundae with one candy topping, one liquid topping, and one type of nuts. How many different ice cream sundaes can you create?

TQSA3i Question 1: Bayes Theorem From 2011 to 2015, more than a thousand Russian athletes in various sports, including summer, winter, and Paralympic sports, benefited from a state-run doping program. A new drug test being considered by the International Olympic Committee can detect the presence of a banned substance when it has been taken by the

Consider the approximately normal population of heights of male college students with mean=70 inches and standard deviation of =6 inches. A random sample of 17 heights is obtained. b) Consider the approximately normal population of heights of male college students with mean=70inches and standard deviation of=6inches. A random sample of17heights is

Would the the following be independent or not? Why? Note that I am making multiple actions. On 1, is there anything that could be clarified? 1) Drawing two cards from a deck 2) Rolling a die twice 3) Flipping a coin twice

$FL2@(#) IBM SPSS STATISTICS 64-bit MS Windows 24.0.0.0 #### ###########F#########Y@02 Jun 1723:41:48 ###########################HEIGHT ########################WEIGHT ########################AGE ########################GENDER ########################SMOKES ########################ALCOHOL ########################EXERCISE################ #######RAN

1) Assume that X is a binomial random variable with n = 8 and p = 0.69. Calculate the following probabilities. (Round your final answers to 4 decimal places .) a. P ( X = 7)= b. P ( X = 6)= c. P ( X 6)= 2) At a local community college, 60% of students who enter the college as freshmen go on to graduate.Eight freshmen are randomly selected. a. What

I do not understand how to do problem 5. Problem 5 (Probability, Random Variables, and Stochastic Processes, Papoulis and Pillai, Ex. 2.27) We have two coins: the first one is fair and the second one two-headed. We pick one of the coins at random, we toss it twice and heads shows both times. Find the probability that the coin chosen is fair.

A literature professor decides to give a 10-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than .10. What score should be set as the lowest passing grade? a)6 b)8 c)7 d)9 Could someone help me with this question and show the steps I should take?

Which tool provides information to help researchers interpret exploratory factor analysis results? A.Factor scores B.Factor loadings C.Eigenvalues D.Scree tests

Hi seemanawal Am doing pretty bad in quantitive analytics course , am pretty new this subject and could not get better grades . Am course is about to finish in 2-3 weeks and my current grade is 67. Could you help me in doing the rest of the assignments and get better grades ? - please let me know thanks -Raj

2: Wagner Printer Wagner Printers performs all types of printing including custom work, such as advertising displays, and standard work, such as business cards. Market prices exist for standard work, and Wagner must match or better these prices to get the business. The key issue is whether the existing market price covers the cost associated with

1)ABC Securities Firm paid out record year-end bonuses of $150,000 per employee for 2005. Suppose we would like to take a sample of employees at the ABC Securities firm to see whether the mean year-end bonus is different from the reported mean of $150,000 for the population. a)State the null and alternative hypotheses you would use to test whether

A city water filtration system is evaluated to see ifits water chlorine levels are remainingconsistent at the recommended 4mg/liter.Twenty samples of water are taken, with a sample average of 4.1 mg/liter and a sample standard deviation of 0.25mg/liter.What is an appropriate statistical conclusion at 95% confidence?

Personnel tests are designed to test a job applicant's cognitive and/or physical abilities. A particular dexterity test is administered nationwide by a private testing service. It is known that for all tests administered last year, the distribution of scores was approximately normal with mean 7373 and standard deviation 6.66.6 . a. A particular

Los calcetines se venden a $10 el par o 2 pares por $19.Lo que se ahorra al comprar 2 pares es Qu porcentaje del costo total, a razn del precio de un solo par?

You'd like to estimate the proportion o 12,111 full-time undergraduate students at a university who are foreign students. You poll a random sample of 50students, of whom 5 are from foreign countries. Unknown to you, the proportion of all undergraduate students who are foreign students is 0.05. Let X denote a random variable for which x=1 denotes

\f

Every year, 10% of people eat a bug in their sleep. Of a group of 100 people, what is the probability that less than 15 of them eat a bug this year? (round to the nearest hundredth)

Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 188 mg/dL and a standard deviation of 24 mg/dL. Let x = cholesterol levels of adult American women(mg/dL) x~N(=188,=24).Using R, Estimate the IQR of the cholesterol levels.please show the steps

Sport Swimmers Soccer Players n=8 n=5 Mean=9 Mean=6 s2=6.29 s2=6 Participant A Before Antioxidant Dose 40 After Antioxidant Dose 45 B 55 55 C 34 35 D 54 56 E 44 43 F 34 36 G 45 57 H 65 62 Source SS df MS F Between A B C 3.50 Within 570 D E Total F G Cigarette Smoking Alcohol Consumption Non-smoker Light smoker Heavy smoker Low M=30 M=20 M=30 High

Ward Doering Auto Sales is considering offering a special service contract that will coverthe total cost of any service work required on leased vehicles. From experience, the company manager estimates that yearly service costs are approximately normally distributed,with a mean of $150 and a standard deviation of $25

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of3.5minutes and a standard deviation of1minute,find the probability that a randomly selected college student will find a parking spot in the library parking lot in longerthan3minutes.

The following table gives the probability distribution of a random variable x. x -2134 p(x) .2.2.5.1 Find P( x3 ) 1.0 .2 .9 .6 .4

2. (2 pts) True or False: If a 99% confidence interval contains 1, then the 95% confidence interval for the same parameter must contain 1. (Justify for full credit)

PLEASE SHOW WORK- Rabbits like to eat the cucumbers in Mimi's garden. There are 12 cucumbers in her garden which will be ready to harvest in about 10 days. Based on her experience, the probability of a cucumber being eaten by the rabbits before harvest is 0.30. (a) Let X be the number of cucumbers that Mimi harvests (that is, the number of

As part of the ongoing training for staff at AKT Hospital, you have been tasked to crea PowerPoint presentation with 10-12 slides about various organizations that conduct health care researchcrea PowerPoint presentation with 10-12 slides about various organizations that conduct health care research The presentation will include a list of 8-10

In a linear regression equation,with a positive relationship, ___________ A) b is positive B) b is negative C) a must be positive D) a must be negative

Interpret the following chi-square analysis. What is the null hypothesis? Using an alpha level of .05, what do you conclude? If you reject the null hypothesis, which cells appear to account for the decision? Crosstab CAN PEOPLE BE TRUSTED Total CAN TRUST CANNOT TRUST DEPENDS BOTH MEN AND WOMEN SHOULD CONTRIBUTE TO INCOME Strongly Agree Count 28 97

8.0) Hello i need assistance with questions that need to be answered ASAP. I am adding a screenshot of the question. Thank you! According to a survey, 53% of the residents of a city oppose a downtown casino. Otthese 58% about 5 out of 10 strongly oppose the casino. Complete parts (a) through {c}. (3) Find the probability that a randomly selected
image text in transcribed

A research hypothesis is that the variance of stopping distance of automobiles on wet pavement is substantially greater than the variance of stopping distances of automobiles on dry pavement.In the research study, 16 automobiles traveling at the same speeds are tested for stopping distance on wet pavement and then tested fir stopping distances on

The president of State University wants to forecast student enrollment for Year 3. Using exponential smoothing with trend, the forecast for the current year (Year 1) is 22,000. Assume the estimated trend is 2,500. What is the forecast for Year 3? a) 24,500. b) 27,000. c) 29,500. d) 32,000. e) 34,500.

Hello i have a question that needs to be answered as soon as possible thank you. i have attached an file for the question.Thank you! Suppose Grant is going to burn a compact disk (CD) that will contain 9 songs. In how many ways can Grant arrange the 9 songs on the CD? Grant can burn the 9 songs on the CD in dierent ways
image text in transcribed

Q2. Dispersion indicators( 10 marks) Use Excel to find the dispersion indicators of the following sample data (state the formula used) 1.Variance 2.Mean deviation 3.Standard deviation 4.Range 5.CV in (%)

The solution to the system - 2x2 - 3x - 38 - 12 = 0 and x + + + 4 = 0 is Select one : O A . ( 2 , - 6 ) OB. ( 0 , 4 ) O C. there is no solution to the system O D. 1 0 , - 4 )
image text in transcribed

Id Model Price Age_in_M KM Met_Color Color Mfr_Guarantee ABS 1 TOYOTA Corolla 1.6 16V HAT 11950 42 55968 0 Blue 1 1 2 TOYOTA Corolla 1.6 16V HAT 10500 35 43000 0 White 0 1 3 TOYOTA Corolla 1.6 16V HAT 10250 52 49432 1 Blue 1 1 4 TOYOTA Corolla 1.6 16V HAT 11500 55 33230 0 Red 0 1 5 TOYOTA Corolla 1.6 16V HAT 8950 59 137050 1 Red 0 1 6 TOYOTA

1. Graph from Fox News Computation Scores Damefle Jared 2. Graph from Fox News can "on App-um tw Umm O' Cctv!" (07 Pan; - January 26 II. noon) 2'J '- l- - 1 fl - L A l I l 'CHI' H '-;S{. L'- r was! a' 'b'i'u'rm .. c 1 S5" 54 Was Raw-cam Was RSUU'S BY PAR" 4. From article in Business Insider -

The probability that a salesperson will sell a magazine subscription to someone who has been randomly selected from the telephone directory is 20%. If the salesperson calls 10 individuals this evening, what is the probability that a) No subscription will be sold? b) Exactly two subscriptions will be sold? c) At least one subscription will be sold?

Random sample of 40 games posted online selected. A month later, the number of times that each had been viewed was tabulated. The mean number of viewings was 179 with a sample standard deviation of 404. Find the upper bound of the 99% confidence interval for the mean number of times games posted online viewed in the first month.

Find any relative maximum or minimum points of the given function: y= -x^3+2x^2+15x+3

0000 T-Mobile LTE 4:40 PM '1 -' mathxl.com F=tili\"\\li-'i-'ll,.lll: "ZillsiI'JH \" | ll-.-1|"ill'l iii-ll |l'-ll lii'f'ii- 'li'li'ili': i" Homework: UNIT 8 - Section 4.4 Homework Score: 0 of 1 pt 1 2 of 5 (2 complete) 7 ) Hw Score: 20%, 1 of 5 pts 4.4.5 EQuestion Help Consider the data set given in the accompanying table. Complete parts (a)

A sample of size52will be drawn from a population with mean18and standard deviation13. Find the probability thatwill be less than21

An annuity - immediate has quarterly payments of 500 for six years at an interest rate of 4 % convertiblesemi-annually.Find its present value.

There are 100 balls in a hat. 20 of them are RED, and 80 are BLACK. 3 balls are drawn at random with replacement. The following is the discrete probability distribution where R is the number of red balls drawn from the hat described above. What is the standard deviation for this probability distribution? (Be sure to use many (oating) decimals in

The Ranger group of industries has a factory that produces three types of action figures, types 1, 2, and 3, on a make-to-order basis. The factory operates five days a week for 9 hours each day. The key decision facing the manager is what type of machine should be used to process each action figure during the coming quarter (13 weeks). Two types

It has long been stated that the mean temperature of humans is 98.6 degrees F. However, two researchers currently involved in the subject thought that the mean temperature of humans is less than 98.6 degrees F. They measured the temperatures of 148 healthy adults 1 to 4 times daily for 3 days, obtaining 600 measurements. The sample data resulted

Scores for a common standardized college aptitude test are normally distributed with a mean of 485 and a standard deviation of 97. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 11 of the men are randomly selected, find the probability

4/9/2017 Quiz: Quiz 8 Quiz 8 Started: Apr 9 at 4:57pm Quiz Instruc ons Question 1 1 pts Use the Table below to answer Questions 17 in this quiz. Using Table 1, which of the following statements contains the correct slope and correct interpretation of the slope? For every increase in the number of siblings, the level of happiness increases by 0.97

A certain flight arrives on time 8787 percent of the time. Suppose 112112 flights are randomly selected. Use the normal approximation to the binomial to approximate the probability that (a) exactly 105105 flights are on time. (b) at least 105105 flights are on time. (c) fewer than 101101 flights are on time. (d) between 101101 and 106106 ,

If, in the regression model, b = 0, we say there is _____________ linear relationship between X and Y. a. an inverse b. a significant c. a direct d. no

A biologist was interested in determining whether sunflower seedlings treated with an extract from Vinca minor roots resulted in a lower average height of sunflower seedlings than the standard height of 15.7 cm. The biologist treated a random sample of 33 seedlings with the extract and subsequently obtained a mean of 13.664 cm and a standard

Assume that human height is normally distributed with mean 170cm and standard deviation 7cm. (a) Simulate a small sample from the human worldwide population by drawing 100 observations from the underlying Gaussian distribution. Plot the true (underlying) distribution as well as the histogram of your sample (overlay them in the same plot). What is

Use lagrange multipliers to find the maximum and minimum values of f(x,y,z)=6x-2y+7z (if they exist) subject to the constraint x^2+y^2+z^2=89 Is there a maximum value, what is it?

PUBH 6033Week 10 Assignment 2 Identifying Risks and HazardsPart 2 (Rubric included) Instructions For this Assignment, review this week's Learning Resources. You will refer back to and use the SPSS output generated in this week's Assignment 1 for this assignment as well. This output is based on the asbestos.sav dataset that related to the incidence

The following data were collected in a clinical trial to compare a new drug to a placebo for its effectiveness in lowering total serum cholesterol. Generate a 95% confidence interval for the difference in mean total cholesterol levels between treatments. New Drug () Placebo () Total Sample () Mean (SD) Total Serum Cholesterol 185.0 (24.5) 204.3

Why is the Central Limit Theorem so important to statistical analysis? How does the Central Limit Theorem help us when we are testing hypotheses about sample means? Reflect on what happens to the shape of a graph when the number of samples increases and number of data in each sample increases i.e., how does an increase in sample affect the

DEVELOP A GENERAL SYSTEMS FLOW CHART THAT DESCRIBES THE PROCESS OF FILLING A CAR WITH GASOLINE. AFTER "START" HAVE A FIRST PROCESS. "ARRIVE AT THE GAS STATION." IMMEDIATELY BEFORE "STOP" HAVE AS THE LAST PROCESS "LEAVE GAS STATION." USING A GENERAL SYSTEMS FLOW CHART DESIGN A SYSTEM FOR ARRIVALS AT AN EMERGENCY ROOM OF A HOSPITAL.

A researcher wants to test if the rate of smoking among adults in Honolulu is different than thenational rate of 18%.He suspects that the rate is lower since Hawaii has strong anti-smoking legislation and the rate was 15% in 2010.He will use a random sample of 400 adults.Select the mostconservativehypotheses. a.H0:p=.18, Ha:p

Living Area (Square Feet) Number of Bedrooms Number of Bathrooms Age (Years) 1272 1272 1350 1456 1488 1620 1666 1666 1218 1248 1380 1486 1785 1876 1876 1986 2058 2093 2107 2109 2195 2203 1498 1498 1510 1548 1590 1605 1620 1662 1666 1672 1728 1743 1772 1804 1806 1821 1836 1894 1908 1920 1921 1921 1932 1944 2022 2087 2116 3 3 2 3 3 3 3 3 3 3 2 3 3 3

\f
image text in transcribed

Calculate the effect size for an independent-samples t test,based on the following information: Group 1 has 10 subjects and the sample mean is 23. Group 2 has 10 subjects and the sample mean is 11. The pooled variance for the populations is 25.

Set up the integral for the surface area of the surface of revolution, and approximate the integral with a numerical method. y=sin(x); 0 < x < pi the "

\f
image text in transcribed

The task of framing a building has been estimated to take an average of 25 days with a standard deviation of 4 days. What duration should be used if there is to be a 90 percent confidence that the duration will not be exceeded? What is the probability that the duration will exceed 23 days?

\f\f\f\f

Supposexhas a distribution with=18 and =17. (Round the probability to the fourth decimal place.)(a) If a random sample of sizen=41 is drawn, find x , x andP(18x20). x = x = P(18x20) =

Carefully define the following terms: Null hypothesis, alternative hypothesis, Type I error, Type II error, one-tailed test, two-tailed test consider this question, when we say that the standard deviation is known--does this mean we know the type of the distribution as well? how do you state the null and the alternate hypothesis? Please provide an

Consider the following discrete probability distribution. x 2552530 P ( X = x )0.460.140.13 a. Complete the probability distribution. (Round your answer to 2 decimal places.) P ( X = 25) c. What is the probability that the random variable X is negative? (Round your answer to 2 decimal places.) d. What is the probability that the random variable X

Showing 800 - 900 of 1508
  • 9 / 16