A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2806 occupants not wearing seat belts, 37 were killed. Among 7699 occupantswearing seat belts, 20 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to be the sample of occupants wearing seat belts. What are the nulland alternative hypotheses for the hypothesis test?OA. Ho: P₁ P2H₁: P₁ P2OD. Ho: P₁ P2H₁: P₁ P2Identify the test statistic.Z=(Round to two decimal places as needed.)Identify the P-value.P-value=(Round to three decimal places as needed.)OB. Ho: P₁ = P2H₁: P₁ P₂OE. Ho: P₁ SP₂H₁: P₁ P₂AOC. Ho: P₁ P2H₁: P₁ P2OF. Ho: P₁P2H₁: P₁ P2 The P-value israte is higher for those not wearing seat belts.b. Test the claim by constructing an appropriate confidence interval.the significance level of a = 0.01, soThe appropriate confidence interval is < (P₁-P₂) <.(Round to three decimal places as needed.)What is the conclusion based on the confidence interval?Because the confidence interval limitsthe null hypothesis. There0, it appears that the two fatality rates arevalues, it appears that the fatality rate isfor those not wearing seat belts.sufficient evidence to support the claim that the fatalityBecause the confidence interval limits include

Answered: ОВ. НЕ H₁: F

Math

Statistics

ОВ. НЕ H₁: F

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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490 undergraduate students at a state university in the southwestern region of the United States were surveyed. Each student in the sample was classified according to class standing (freshman, sophomore, junior, or senior) and body are category (body piercings only, tattoos only, both tattoos and body piercings, no body art). Use the data in the accompanying table to determine if there is an association between class standing and body art category. Assume that it is reasonable to regard the sample as representative of the students at this university. Use α = 0.01. 1. What type of question is this-estimation or hypothesis?2. What type of study is this sample data or experiment data?3. What type of data is this? Univariate or bivariate? Categorical or Numerical?4. How many samples or treatments?