A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2905 occupants notwearing seat belts, 37 were killed. Among 7830 occupants wearing seat belts, 13 were killed. Use a 0.05 significancelevel to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.what is the conclusion based on the nypotnesis test?The P-value isY the significance level of α = 0.05, soY the null hypothesis. Theresufficient evidence to support the claim that the fatality rate is higher for those not wearing seat belts.b. Test the claim by constructing an appropriate confidence interval.The appropriate confidence interval is < (P₁-P2) <0.(Round to three decimal places as needed.)What is the conclusion based on the confidence interval?Because the confidence interval limitsBecause the confidence interval limits includefor those not wearing seat belts.0, it appears that the two fatality rates arevalues, it appears that the fatality rate is KA simple random sample of front-seat occupants involved in car crashes is obtained. Among 2905 occupants notwearing seat belts, 37 were killed. Among 7830 occupants wearing seat belts, 13 were killed. Use a 005 significancelevel to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.OA. Ho: P1 SP2H₁: P1 P2OD. Ho: P1 = P2H₁: P1 P2Identify the P-value.Identify the test statistic.2-0(Round to two decimal places as needed.)0-0OB. Ho: P1 = P2H₁: P1 P2P-valueM-.LTL 11144OE. Ho: P1 P2H₁ P1 = P2OC. Ho P1 = P2H₁: P1 P2OF. Ho: P12 P2H₁: P1 P2

For "Not wearing seatbelts": The sample size, n1=2905. The sampled occupants, who were killed,…

Answered: Simple random sample of front-seat…

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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At CPU, it is estimated that fewer than 25% of the students have cars on campus. Does this seem to be a valid estimate if, a random sample of 90 college students, 28 are found to have cars? Use a 0.05 level of significance.
A software company is interested in improving customer satisfaction rate from the 60% currently claimed. The company sponsored a survey of 148 customers and found that 95 customers were satisfied. What is the test statistic z?
Is there an association between daily screen time and exercise habits in high school students? Mia selects a random sample of 123 high school students and categorizes them into 1 of 3 categories of screen time and whether they exercise. She would like to determine if there is convincing evidence of an association. Let = 0.05. What are the hypotheses for this test? H0: There is an association between daily screen time and exercise habits in high school students.Ha: There is no association between daily screen time and exercise habits in high school students.H0: There is no association between daily screen time and exercise habits in high school students.Ha: There is an association between daily screen time and exercise habits in high school students.H0: There is no difference in the distribution of daily screen time and exercise habits in high school students.Ha: There is a difference in the distribution of daily screen time and exercise habits in high school students.H0: There is a…
A simple random sample of front-seat occupants involved in car crashes is obtained. Among3000occupants not wearing seat belts,36were killed. Among 7697occupants wearing seat belts,18were killed. Use a0.05significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below.
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Primary seat belt laws allow police to stop a motorist for not wearing a seat belt. According to the National Highway Traffic Safety Administration, the percentage of drivers wearing seat belts in the Limpopo province was 68.5% in 2017 and 72% in 2018. Assume that these percentages are based on random samples of 1000 drivers in 2017 and 1050 in 2018. Suppose you must test at 5% level of significance whether the proportion of all drivers in Limpopo province who used seat belts in 2017 is lower than that for 2018. 1 Questions I) Determine the alternative hypothesis to be tested: II) Determine the value of test statistic: III) Determine the p-value for this problem: IV) the conclusion Since Z=-1.734 is greater than Z subscript 0.05 end subscript equals negative 1.645, we then reject the null hypothesis at 5% level of significance and conclude that the proportion of all drivers in Limpopo province who used seat belts in 2017 is lower than that for 2018. b) Since Z=-1.734 is less…
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