Question

TYPED ANSWERS ONLY

A social psychology professor is interested in determining whether cell phone use while driving is related to having received a speeding violation. Complete the following. (1 point each)

• What statistical test would be appropriate to use? Explain the rationale for your answer.
• Suggest how levels of these variables might be arranged in a table.
• Write an example of how the null and alternative hypotheses for this test could be stated.
• Is the statistical test right-tailed, left-tailed or two-tailed? Explain the rationale for your answer.
• Assuming a statistically significant outcome, write a statement summarizing the conclusion.

Answer 1

The statistical test that would be appropriate to use is the Chi-square test of association because we have two categorical variables to create a contingency table.

Cell phone usage would be categorized as Yes/No and received a speeding violation would be categorized as Yes/No.

The hypothesis being tested is:

H₀: There is no relationship between cell phone use while driving and received a speeding violation.

H_a: There is a relationship between cell phone use while driving and received a speeding violation.

Since the Chi-square test is always right-tailed, this is a right-tailed test.

If a statistically significant outcome is observed, then we can conclude that cell phone use while driving is related to having received a speeding violation.

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