(1 point) Buckle up! - How does seat belt use vary with drivers' ethnic group? It is well known that location and gender

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1 Point Buckle Up How Does Seat Belt Use Vary With Drivers Ethnic Group It Is Well Known That Location And Gender 1 (46.62 KiB) Viewed 84 times

(1 point) Buckle up! - How does seat belt use vary with drivers' ethnic group? It is well known that location and gender (males are less likely to buckle up) are factors. Here is the data and the mosaic plot for a random sample of male drivers observed in Houston. Ethnic group of driver Belted Not Belted Black 272 90 Hispanic 374 166 White 194 62 Total 840 318 Total 362 540 250 1158 Ethnicity Black Hispanic White Use of Seat Belt warga sebe 1. Select the name of the test that should be used to assess if there is a relationship between seat belt use and ethnic group. A. X2 test of independence B. One-proportion z-test OC. x goodness of fit 2. Which of the following conditions must be met for the hypothesis test to be valid? Select all that apply. DA. The sample size must be at least 30 or the population data must be normally distributed. B. There must be an expected count of at least 5 in every cell of the table. C. There must be at least 10 "success" and 10 "failure" observations D. The observations must be independent of one another 3. What is the expected value for the number of White drivers who were not wearing a seat belt? Expected value = 4. State the degrees of freedom for this test. df 5. Calculate the test statistic 6. What was the contribution toward this test statistic of White drivers who were not wearing a seat belt? Test statistics 7. Calculate the p-value for this test. p P= 8. Based on the above p-value, we have some evidence against the null hypothesis.