# Question: Refer to Problem 14 a Determine a 98 confidence interval

Refer to Problem 14.

a. Determine a 98% confidence interval for the difference, p1 − p2, between the proportions of Maricopa County residents who thought that the state’s economy would improve over the next 2 years during the time of the first poll and during the time of the second poll.

b. Interpret your answer from part (a).

a. Determine a 98% confidence interval for the difference, p1 − p2, between the proportions of Maricopa County residents who thought that the state’s economy would improve over the next 2 years during the time of the first poll and during the time of the second poll.

b. Interpret your answer from part (a).

## Answer to relevant Questions

Refer to Problems 14 and 15. a. Take half the length of the confidence interval found in Problem 15(a) to obtain the margin of error for the estimate of the difference between the two population proportions. Interpret your ...The Influence of Finasteride on the Development of Prostate Cancer” (New England Journal of Medicine, Vol. 349, No. 3, pp. 215–224), I. Thompson et al. reported the results of a major study to examine the effect of ...Suppose that you want to find a 95% confidence interval based on independent samples for the difference between two population proportions and that you want a margin of error of at most 0.01. a. Without making an educated ...Distribution: 0.2, 0.1, 0.1, 0.3, 0.3; Observed frequencies: 9, 7, 1, 12, 21; Significance level = 0.10 We have provided a distribution and the observed frequencies of the values of a variable from a simple random sample of ...A gambler thinks a die may be loaded, that is, that the six numbers are not equally likely. To test his suspicion, he rolled the die 150 times and obtained the data shown in the following table. Do the data provide ...Post your question