# Question

Explain what the expected frequencies represent in a test of independence.

## Answer to relevant Questions

Use the data in Table 12.9 to test the null hypothesis that acceptance to graduate school is independent of gender. Show that this hypothesis is rejected at the . = 0.01 level. For each department, compute the proportion of all applicants who are men. How's your mileage? Use the data in Exercise I for the following. a. Compute a point estimate for the mean mileage for trucks that weigh 20 tons. b. Construct a 95% confidence interval for the mean mileage of trucks that ...The quantity ∑(x - )2 measures the spread in the x-values. Explain why using x-values that are more spread out will result in a narrower confidence interval for. Power plant pollution: Using the data in Exercise 10, perform the Tukey—Kramer test to determine which pairs of means, if any, differ. Use the a = 0.05 level of significance.Post your question

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