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Mathematics Questions and Answers May 26, 2023

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Assessing the average likelihood of occurrence for a risky event is a violation of which calibration method

the annual fuel cost is an estimate assuming 15,000 miles of travel a year and an average fuel price . what are the individuals in this data set ? several variables are given in the table. which of the variables are categorical and which are quantitative? classify the items as an individual , categorical variable , or quantitative variable as

For the same scenario: A publication in China investigated the potential health hazards of working long hours in front of a computer screen. In the publication, the mean quantity of hours before patients noticed eye strain was 2.3 hours with a standard deviation of 0.55 hours. You think that American's have a higher tolerance of screen time. You

Regression might be used to predict an interest rate given to borrower by the lender based on certain risk characteristics. In this regression, the dependent variable would be which of the following? Risk characteristics. Demographic characteristics. Interest rate. Loan acceptance

IV. The joint pmf of X and Y is f(x, y) = 1 6 , 0 x + y 2 where x and y are non-negative integers. (a) Sketch the domain of f. (b) Determine the marginal pmf's of X and Y . (c) Find E[Y |x] (i.e. the conditional mean of Y given X = x) and plot the points (x, E[Y |x]) on the sketch from part (a). Page 5 Weekly Homework 6 (d) Find E[X|y] and plot

Suppose that we are interested in assessing whether two groups formed by variable X5 exhibit statistically significant differences for three outcome variables measured by X19, X20, and X21. After running the command "manova X19 X20 X21 = X5" in Stata, we get the following results: 196..0 211.. 92 01.. 10 201..92 0.. 1080 11.1427 1 96.. 1 201.. 92
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Use the data below to complete the following calculations. X 50 41 23 97 75 78 47 61 y 13 82 53 13 18 17 36 22
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Define a random variable by the following procedure. Flip a fair coin. If it comes up heads, the value is 1. If it comes up tails, roll a die: if the outcome is 2 or 3, the value of the random variable is 2. Otherwise, the value is 3. (a) What is the probability distribution of this random variable? (b) What is the cumulative distribution of this

The stock of Matchpoint Trading Co. has an expected annual return of 9% and a standard deviation of 17%. Assuming the returns are distributed normally, what range of returns would you expect to observe with a 99.7% probability in any given year? a. from -27.5% to 47.3% b. from -8% to 26% c. from -42% to 60% d. from -8.8% to 28.6% e. from -25% to

Question 1 of 10 The following data values represent a sample. What is the variance of the sample? x =9. Use the information in the table to help you. X 17 5 11 (x/-X)2 64 16 4 64 4
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Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. Shaded area is 0.4013. What calculator function do I use to get answer

Which of the following is TRUE for multiple regression software? a. The software calculations depend on the purpose. b. The software only needs the dependent variable. c. The software only needs the independent variable. d. The software needs both the independent and dependent variables

Twelve drivers enter a race a) In how many different ways can we give out prizes for first second and third place b) In how many different ways can we select 3 drivers to make up a rules committee

A store carries flash drives with either 1 GB, 2 GB, 4 GB, 8 GB, or 16 GB of memory. Compute E(X) and V(X) where the accompanying table gives the distribution of X = the amount of memory in a purchased drive:

Which would not assist in making an ideal chart or graph for data analysis

Develop a 98% confidence interval estimate of the population mean sales price and population mean number of days to sell for Domestic cars. What is the margin of error? Interpret what each confidence intervals means. How can both confidence intervals provide useful car sales information? What other confidence interval would you choose to compute

Does the frequency distribution appear to have a normaldistribution? Explain. Temperature (degreesF) Frequency 40 dash 4440-44 11 45 dash 4945-49 44 50 dash 5450-54 88 55 dash 5955-59 1212 60 dash 6460-64 88 65 dash 6965-69 33 70 dash 7470-74 11 Question content area bottom Part 1 Choose the correct answer below. A. Yes, because the frequencies

Use the RSA cipher with public key n = 713 = 2331 and e = 43. Encode the word "KING" into its numeric equivalent and encrypt it. (Encode one letter at a time. Assume the letters of the alphabet are encoded as follows: A = 001, B = 002, C = 003, ..., Z = 026. Enter your answer using a fixed number of digits: 001 for 1, 002 for 2, ..., 099 for 99.)

Day Self-Service Checkout Sales Employee Operated Checkout Sales 01/07/2024 33,850.88 37,736.00 02/07/2024 40,683.92 29,732.59 03/07/2024 31,235.50 36,840.21 04/07/2024 29,547.21 46,599.68 05/07/2024 25,302.74 50,854.96 06/07/2024 31,745.49 36,572.47 Using the above data calculate mean, variance, observation, pooled variance, degrees of freedom,

Assume that the (population mean) for a test was 50 and the (population standard deviation) was 4.5.Lisa scored 56 on the test, Jill had a z-score of +1.5, and Ellianna scored at the 75th percentile.Who did the best on the test (in other words, who had the highest score)? Jill Lisa Ellianna The performance of all three was identical

Month Commercial Price ($000/cu ft) Residential Price ($000/cu ft) Jan-2008 11.20 12.24 Feb-2008 11.49 12.58 Mar-2008 12.03 13.13 Apr-2008 12.63 14.49 May-2008 13.51 16.33 Jun-2008 14.68 18.91 Jul-2008 15.64 20.77 Aug-2008 14.19 20.17 Sep-2008 13.12 18.41 Oct-2008 12.06 15.45 Nov-2008 11.72 13.80 Dec-2008 11.61 12.84 Jan-2009 11.28 12.49 Feb-2009
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Scenario/Research Question:How does exercise impact the serum sodium level in healthy young adults? Variables:exercise - independent serum sodium level - dependent Population:healthy young adults Null Hypothesis:There is no impact of exercise on serum sodium level in healthy young adults. SPSS Output Oneway Descriptives Serum Sodium N Mean Std.

You roll two fair dice, a green one and a red one. (a) What is the probability of getting a sum of 7? (Enter your answer as a fraction.) (b) What is the probability of getting a sum of 11? (Enter your answer as a fraction.)

i need help with this question. Find the total area of the region(s) bounded by the curves: y = x , y = 2x -15 and y = 0.

(12 points) Using the plots below, report whether there is: (1) a main effect of A; (2) a main effect of B; (3) an interaction effect. b1 b2 Main effect A? Main effect B? Interaction AB? al a2 bi b2 Main effect A? Main effect B? Interaction AB? a2 b2 X Main effect A? Main effect B? Interaction AB
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Contraste los mtodos tabulares y grficos empleados para datos cualitativos y cuantitativos. Resumen de datos cualitativos Resumen de datos cuantitativos Tabla de contingencia Representacin grfica de datos Histograma Distribucin de frecuencia Grfica de barras Grfica de pastel Histograma Ojiva Contraste los mtodos tabulares y grficos empleados para

PSYC 2019H B: Assignment 1 (WI2024) 10% of final grade Due: February 12 at beginning of lecture Last Name, First Name: _____________________________________ This assignment requires hand calculations only. JASP uses a slightly different formula for Standard Deviation than your text, so we will not use JASP for this assignment. Submit a paper copy

Are all the coefficients in the regression jointly significant at the 1% level? (Ie R squared statistically different than zero) 1. Use the outputs below to answer each of the following questions. Dummy =1 if the resume has a white-sounding name. gen white=(race=="b") Dummy =1 if the sex listed in the resume is male. gen male=(sex=="m")
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A baseball player running forward at 3 meters per second throws a ball with a velocity of 20 meters per second at an angle of 20o with the horizontal. What is the resultant speed and direction of the throw?

Please Help me Open the corks ne Intervals for a Proportion wih p = 0.3 Applet or go to statcrunch and select Applets > confidence interval > for a proportion. 1. Exploring the role of confidence level: a) Construct 1,000 confidence interval with n= 100, p= 0.3. What proportion of the 9596 confidence interval included the population proportion,
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angle thetais a third-quadrant angle and tantheta=5/12; using this information find the value. sec theta = a.-13/12 b.13/12 c.-13/5

The weight of a newborn animal is given by the formulaW = 4 d + 9 W=4d+9 whereW W is the weight in grams andd d is the number of days since hatching. Which variable causes the other variable to change?

A shipment of 13 13 microwave ovens contains 4 4 defective units. A restaurant buys four four of these units. What is the probability of the restaurant buying at least three three nondefectiveunits? The probability of the restaurant buying at least three three nondefective units is

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Question: For an independent t test, omega-squared is a(n) O confidence interval difference score effect size O phi coefficient
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n football leagues, statistics such as the success rate of goal scoring and the percentage of complete passes, to name just a few are collected for the players. Cristiano Kweh, who is a player at British Premier League, has a career completion percentage of 55%. Cristiano got a new coach and then played a few games where he completed 48 of 100

Use technology to solve the following problem: A sample of size 45 will be drawn from a population with mean 94 and standard deviation 14. Find the 32nd percentile of

Strict-sense and wide-sense stationary processesLet X, be a zero-mean, WSS process with correlation function Rx (t). Let Y, := X, cos(2x fi + 0), where O - uniform [-x, x] and O is independent of the process X,. (a) Find the correlation function of Y
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Part 2: If Ali failed to reject his null hypothesis when in fact the mean wages were different, what type error would he commit? Group of answer choices Type I error: reject a null hypothesis when in fact the null hypothesis is false Type I error: reject a null hypothesis when in fact the null hypothesis is true Type II error: fail to reject a

Which of the following best represents the "Learned Hand" formula for reasonable care in a negligence tort? a. Determine whether a combination of the likelihood of harm/gravity of the harm outweighs the burden of taking precautionary measures. b. Determine whether the person had an affirmative duty to act. c. Look at the actions of an imaginary

For the last seven presidential elections high school juniors were asked ten questions about who they would vote for and why. This is an example of: O sampling bias. a trend study. panel questioning. O cohort analysis. a pretest-posttest control group design

How do you know the difference of when to use Z* or then to use t* when you are finding the p value

What is the measurement level of each of the following variables? Students' IQs. The distance students travel to get to class. A classification of individuals by date of birth. A classification of employees by level: entry-level, professional, supervisor, manager, executive. Number of hours students study per week

Find the side r of a square with minimum area which is inscribed in a square of side 1

To determine statistical significance, a correlation uses which distribution? Question 1 options: t-distribution r-distribution X^2 distribution F-distribution

2. Suppose you want to estimate a population parameter ( such as the population mean . ) Why is it important to provide a range of likely values , as we do with a confidence interval , rather than just find the average of one* sample of data and using that as your estimate ?"
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A colonoscopy is a screening test for colon cancer, recommended as a routine test for adults over age 50. One study provides some evidence that this test saves lives. The proportion of people with colon polyps expected to die from colon cancer is 0.01. A sample of 2602 people who had polyps removed during a colonoscopy were followed for 20 years,

Need solutions to problems below. Mean: ? Median: ? Mode: ? Maximum: ? Minimum: ? \f
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1.Modify the random walk R simulation discussed in class (variation is given in randomWalkPoints.rin the R Computational Toolbox folder downloaded from the textbook website) to make the probability of incrementing x bepx = .3 and the probability of incrementing y be py = .8. (a)Create 25 random steps and list the results (b)Modify the simulation

Help with the following and how to solve it pls and thank you Find the zseores that separate the middle 40% of the distribution from the area in the tails of the standard normal distribution. The zsoores are I]. (Use a comma to separate answers as needed. Round to two decimal places as needed.)
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Please help me with these questions and answers. Professional basketball has truly become a sport that generates interest among fans around the world. More and more players come from outside the United States to play in the National Basketball Association (NBA). You want to develop a regression model to predict the number of wins achieved by each
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Hello tutor, I need your kind assistance with the following questions below. Please use the instruction as a guide to answer the question and the data set below as reference. Thank you Instruction An experiment was conducted on randomly selected Fraser students: each student sees a photo of an object (visual) and then identifies the object, and

The heights of 4th grade students follow a Normal distribution, with a mean of 51.8 inches and a standard deviation of 3.7 inches. Gordon is a 4th grade student, and when Gordon's height is converted to a z-score, it is equal to -0.8. This means that within this distribution of heights, Gordon's height is Group of answer choices below Q1. above

I am not sure how the data analysis is changing in the world. I have never had to deal with it in any job that I have had. However, I do believe that the further that I go along and gather more experience, that I will use it. I do believe that this course has helped me learn a few things

This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was that the regular movie attendant enjoyed the movie with 8.3 points and a standard deviation of 0.5 points. What is the percent of people who gave the movie a rating between 6.8 and 8.8?

I cant get the 99% part right what am I doing wrong?? \f
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How should I commente R-square 0.5903 , it's aboyut typing experience (years)?

A Radio station runs a promotion at an auto show with a money box with 14 $25 tickets, 14 $5tickets, and 14 $1 tickets. The box contains an additional 20 "dummy" tickets with no value. Three tickets are randomly drawn find the probability that all three tickets have no value . The probability that all three tickets drawn have no money value is ___

Given Data Set: 10.9, 11.9, 12.2, 12.2,12.9, 12.6. What is the mean value of the given data set. Calculate the variance of the data set.

Using the plot below, report whether there is: (1) a main effect of A; (2) a main effect of B; (3) an interaction effect

25 Type the correct answer in the box. If necessary, use / for the fraction bar. A bag contains 15 dark chocolates, 16 caramel chocolates, and 19 milk chocolates. The probability that Amber's teacher distributes the chocolates among her students is 0.4. If the teacher offers Amber a chocolate from the bag, the probability that she randomly picks

QUESTION 11 Suppose you want to construct a sampling distribution of p. Which of the following will prevent you from constructing the sampling distribution? O a. The samples all have the same sample size O b. There are only five people in each sample c. You have only five samples O d. Both A and C O e. Both B and C Of. None of above
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Should a parametric or nonparametric test be used? A researcher measures the proportion of schizophrenic patients born in each season. A researcher measures the average age that schizophrenia is diagnosed among male and female patients. A researcher tests whether frequency of Internet use and social interaction are independent. A researcher

Find the Taylor series for f ( x ) centered at the given value of a , assuming that f ( x ) has a power series expansion about a . f ( x ) = x x 3 a =2

Assume that when comparing the patient outcomes of two different doctors we observe that there is a higher death rate among the patients treated by Doctor A than those treated by Doctor B. Based on this information, which of the following can we reasonably conclude? Group of answer choices Doctor B is a better physician than Doctor A. The patients

Go to a local library; collect a sample of books consisting of the ages of book (based on copyright dates). Plan and describe the sampling procedure, then use the results to construct a confidence interval estimate of the mean age of all books in the library. Please, post and share your results with the class.

7. __________ is a moral value expected of all caregivers. a. Indifference b. Compassion c. Antipathy d. Suffering

Weights of carry-on luggage on international flights are normally distributed with mean 14.3 lbs. and standard deviation 3.8 lbs. The probability that a randomly selected carry-on bag weighs at most 15 lbs. is about... A 0.43 B 0.76 C 0.83 D 0.57 E 0.04

In #6, you will conduct a statistical test to determine whether participants' communication apprehension in groups is associated with their communication apprehension in meetings. 6-a. Which variables are involved in this statistical test? 6-b. Which is the independent variable? 6-c. Which is the dependent variable?

1.Think of a study where the marginal structural model would be a useful tool. Specify: a.time varying covariates b.time-dependent confounding variables c. outcome

4. A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. Number of Days Absent Probability 0 0.55 1 0.25 2 0.12 3 0.04 4 0.04 5 - What is the variance of the number of days absent? A. 1.1371 B. 0.7777 C.

A test was given and the results were summarized as follows: The mean was 65 and the standard deviation was 5. Sally's z-score for the test was -2.0. What was her raw score on the test? Question 50 options: 55 75 73 60 none of these options

Sample mean (xbar) control charts monitor production processes graphically over time using the basic concepts of confidence intervals.

3. Measuring effect size for two-factor ANOVA It is projected that approximately 580,000 veterans will take advantage of the GI Bill for the 21st Century. Boots to Books is a course for all veterans, current military members, and their family members, friends, and supporters. The goal of Boots to Books is to assist deployed, postdeployed, and

The drive-thru window at Hokie Burger requires 2.4 minutes on average to process an order with a standard deviation of 2 minutes. Cars arrive at the window at a rate of 21 per hour. (a) On average, how many cars are waiting to be served? (Round your answer to four decimal places.)

Suppose you were designing a focus group to follow up on that survey and learn more about Southwest Airlines customers' wish for free onboard meals. What questions would you ask the participants

Do more than 70% of local high school graduates go to college? A random sample of 400 local high school graduates found that 288 went to college. Complete the hypothesis test by filling in the blanks. Use a 5% level of significance. H 0 : p = 0.70 H a : p________ 0.70 (Enter either , or not-equal) Decision Rule: Reject H 0 if zcalc >_______ .

What type of data is found in each column (e.g., categorical [nominal]; interval [continuous])? After naming, describe what each data is, how it is used and what it represents

It has been observed that one of the health issues in Winnipeg is obesity. A study was conducted to address this concern. A random sample of 1000Winnipeggers was selected and found that 629 of them were over-weight. (a) Conduct an appropriate hypothesis test, at the 1% level of significance to determine whether the proportion of over-weight

Which of the following is not a qualitative method commonly used in evaluation? Group of answer choices Historical analysis Time series Case studies Nominal group process

Suppose that all possible n= 50 samples are selected from a population. How would the mean, standard deviation, and shape of the resulting sampling distribution compare to a sampling distribution based on all possible n= 100 samples? Explain your reasoning

Assume that an input data set has four variables: A,B,C,D and they are used to create four Principal Components: PC1, PC2, PC3, and PC4. If A,B,C,D are all highly correlated, then what do you know about the correlation of PC1, PC2, PC3, and PC4? a. PC1, PC2, PC3, and PC4 are also highly correlated b. PC1, PC2, PC3, and PC4 are completely

Answer a question myopenmath.oom Chapter 8.3 Homework Score: 0/13 0/13 answered Progress saved Done {El}! WC. 0 Question 5 v E 0/1 pt '0 3 8 99 (D Details You wish to test the following claim (Ha) at a significance level of oz : 0.02. Hazy : 62.2 Haul ~o 0 H12 Select an answer hours Based on the hypotheses, find the following: Test Statistic=
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The term relative-age effect refers to: Group of answer choices the fact that, for some youth sports, there are cut off dates for enrollment. Therefore, the youths who have birthdays way ahead of the cut-off dates may be more mature and capable than those who have birthdays just before the cut-off dates the fact that, for some youth sports, there

Hi: if an a priori sample size ( N = 82) was calculated for a medium effect size of .25, alpha of .05, and power of .95 but you have only 52 subjects- how does that affect the power (and validity)? Thanks!

Devonte' Graham joined the Charlotte Hornets as rookie for the 2018-19 season and put up a three-point percentage of 28.1%. Fans are curious as to whether he will have a better or worse three-point percentage this season. So far, he has made 31 three pointers out of 73 attempts. Test whether his three-point percentage is different from last season

What is the process of allocating numbers or other symbols to responses in collected data called

A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 467. Assume the population standard deviation is =0120. Construct a 99.5% confidence interval for the mean mathematics SAT score for the entering freshman class. Round the answer to the nearest whole number
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Sequence: a.) Draw a sequence of figures made of small circles so that Nth term is 3N+2 small circles. b.) Describe how the subsequent figures in your sequence would be formed. c.) will there be a figure in the sequence that is made of 100 small circle? Prove with algebra or using reasonable of a third grader.

3. A new cold medication was tested by giving 125 people the drug and 100 people a placebo. A control group consisted of 115 people who were given no treatment. The number of people in each group who showed improvement is shown in the table below. Cold Drug Placebo Control Total Improvement 72 55 38 165 No Improvement 53 45 77 175 Total 125 100

Suppose that you arrive at a bus stoprandomly, so all arrival times are equally likely. The bus arrives regularly every 60 60 minutes without delay. What is the expected value of your waitingtime?

Find an empirical article that reports a t -test (HINT: look for experimental studies). I strongly suggest using the PsycArticles database. Take a screenshot of where that t -test is reported in the paper and paste the picture here. Then, interpret this result in everyday language.

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