1. A retail store receives an average of 5.9 return per day. For a sample of 7 days, it receivedthe following number of retums: 7, 8, 9, 8, 7, 7, 10. At 5% significance level, can weconclude the mean number returns is more than 5.9?A) State Ho and H.B) Test the hypothesis using the P-Value approach.C) What are Type I and Type II errors?D) Based on the given data, determine the extreme value without rejecting the Ho.

Given Information: A store receives an average of 5.9 return per day. Sample size n=7 Sample data is…

Answered: 1. A retail store receives an average…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Only 10% of registered voters voted in the last election. Will voter participation increase for the upcoming election? Of the 399 randomly selected registered voters surveyed, 52 of them will vote in the upcoming election. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer
Since an instant replay system for tennis was introduced at a major tournament, men challenged 1421 referee calls, with the result that 418 of the calls were overturned. Women challenged 778 referee calls, and 228 of the calls were overturned. Use a 0.01 significance level to test the claim that men and women have equal success in challenging calls. Complete parts (a) through (c) below. O A. Ho: P1 = P2 O C. Ho:P1 = P2 H1: P1 > P2 O B. Ho:P1 = P2 H1: P1 #P2 H1: P1
Define the related-repeated (pre/post) two-sample t-test and the related-matched two-sample t-test.
13. Are Seat Belts Effective? A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed (based on data from "Who Wants Airbags?" by Meyer and Finney, Chance, Vol. 18, No. 2). We want to use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. a. Test the claim using a hypothesis test.
A Gallup Poll of 800 adults showed that 510 adults are opposed to high school students attending school year-round without the traditional summer break. We want to test that more than 60% of all adults oppose year-round school. Use a significance level of a = 0.05. Check all of the conditions that are needed for this test. O 10% Condition O Normality Assumption O Independence Assumption Randomization Condition Success / Failure Condition O Dependence Assumption O Sample Size Assumption
A2)
A telephone company claims that more than 15% of its customers have at least two telephone lines. The company selects a random sample of 250 customers and finds that 50 have at least two telephone lines. Does the data support the claim? Use a P- value. Which of the following is correct? a. H0: p = 0.15 versus H1: p = 0.15, reject HO at 0.05 level of significance O b. H0: p ≤ 0.15 versus Hl: p > 0.15, at 0.01 level of reject HO significance c. H0: p ≤ 0.15 versus Hl: p > 0.15, not reject HO at 0.01 level of significance O d. H0: p ≤ 0.15 versus H1: p > 0.15, not reject HO at 0.05 level of significance do do
21) Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. An article in a journal reports that 34% of American fathers take no responsibility for child care. A researcher claims that the figure is higher for fathers in the town of Littleton. A random sample of 234 fathers from Littleton yielded 96 who did not help with child care. Test the researcher's claim at the 0.05 significance level. Provide an appropriate response
A criminologist was interested in whether there was any disparity in sentencing. She selected at random of 24 drug convictions for cocaine distribution and compared the prison terms given by two judges as below. Judge1 Judge2 7 5 7 6 6 4 5 5 2 5 5 5 7 4 6 6 5 5 7 5 10 4 7 5 From performing a hypothesis test to determine if judge1 differs from judge2 in the mean of sentence years, what is the p-value? (Round off to three decimal places if necessary)
Suppose you want to take a random sample of GMAT scores to determine whether there is a significant difference between the GMAT scores given in March and the scores for the test given in June. Use the Mann Whitney U-test to determine whether there is a significant difference in the two test results at a 10% significance level. March: 540, 740, 600, 430, 500, 510, 530, 560, 550, 490June: 350, 470, 630, 590, 610, 520, 460, 550, 530, 570 Let June be group 1. What is the rank sum, W1? What is the value of the test statistic, U?
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I chose option 1. I believe that the population mean number of times that adults eat fruit with their breakfast is greater than 3 times. I spoke with 14 adults and found that they had fruit with breakfast 7,2,3,0,0,0,4,7,7,7,4,4,5,and 0 times in the past week. Test this hypothesis at the .05 significance level and assume a random sample.

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