Consider the following data from a study of high school students at least 16 years of age. Assume that we want to use a 0.05 significance level to test the claim of independence between texting while driving and driving when drinking alcohol.

a. What is it about the given table that makes it a two-way table? Identify the two variables shown in the table.
b. What are the null and alternative hypotheses for this study?
c. Find the expected frequency for the cell with an observed frequency of 731.
d. The test statistic for this hypothesis test is x2 = 576.224.

Find the critical value. What do we conclude?

Transcribed Image Text:

Texted while driving Did not text while driving Drove when drinking alcohol 731 156 Did not drive when drinking alcohol 3054 4564