# Question: People over the age of 40 years tend to notice

People over the age of 40 years tend to notice changes in their digestive systems that alter what and how much they can eat. A study was conducted to see whether this observation applies across different ethnic segments of our society. Random samples of Anglo- Saxons, Germans, Latin Americans, Italians, Spaniards, and African Americans were obtained. The data from this survey are summarized here:

a. Does it appear that there may be a bias due to the response rates?

b. Compare the rates (πis) for the Anglo- Saxon and German groups using a 95% confidence interval.

a. Does it appear that there may be a bias due to the response rates?

b. Compare the rates (πis) for the Anglo- Saxon and German groups using a 95% confidence interval.

## Answer to relevant Questions

Refer to Exercise 10.82. There seem to be two distinct rates— those around 12% and those around 70%. Combine the sample data for the first two groups and for the last four groups. Use these data to test the hypotheses H0: ...A study was conducted to determine the relationship between annual income and number of children per family. Compute percentages for each of the income categories; then run a chi- square test of independence and draw ...Refer to the data of Exercise 11.7. a. Calculate a 95% confidence interval for β1. b. What is the interpretation of H0: β1 = 0 in Exercise 11.7? c. Test the hypotheses H0: β1 = 0 versus Ha: β1 ≠ 0. d. Determine the p- ...Refer to Exercise 11.1. a. Plot the equation ŷ = .51 + 1.38x in the scatterplot produced in Exercise 11.1. Comment on how close this line is to the line you fitted through the points. b. Use the equation ŷ = .51 + 1.38x to ...Refer to Exercise 11.27. a. Test the hypothesis H0: β0 = 0 using a t test with a = .05. b. Determine the p- value for this test, and interpret its value. In exercisePost your question