Consider the following results for independent samples taken from two populations. Sample 1 Sample 2 ni = 400 n2= 300 P1= 0.44 P2= 0.36 a. What is the point estimate of the difference between the two population proportions (to 2 decimals)? b. Develop a 90% confidence interval for the difference between the two population proportions (to 4 decimals). Use z-table. to c. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals). Use z-table. to

Consider the hypothesis test below. Ho: p1-P2 0 The following results are for independent samples taken from the two populations. Sample 1 Sample 2 ni = 200 n 2 = 300 P1 = 0.29 P 2 = 0.19 Use pooled estimator of p. a. What is the value of the test statistic (to 2 decimals)? b. What is the p-value (to 4 decimals)? Use z-table. c. With a = .05, what is your hypothesis testing conclusion? ✓ Select Conclude the difference between the proportions is greater than 0 Cannot conclude the difference between the proportions is greater than 0

A Businessweek/Harris survey asked senior executives at large corporations their opinions about the economic outlook for the future. One question was, ‘Do you think that there will be an increase in the number of full-time employees at your company over the next 12 months in the current survey, 240 of 400 executives answered Yes, while in a previous year survey, 199 of 400 executives had answered Yes. Provide a 95% confidence interval estimate for the difference between the proportions at the two points in time (to 4 decimals). Use 2-table. to What is your interpretation of the interval estimate? Select more executives are predicting Select in full-time jobs. The confidence interval shows the difference may be from Select to Select