Question

1) The Cranston Hardware Company is interested in estimating the difference in the mean purchase for men customers versus women customers. It wishes to estimate this difference using a 95 percent confidence level. If the sample size is n- 10 from each population, the samples are independent, and sample standard deviations are used, and the variances are assumed equal, calculate the critical value t 2) The NCAA is interested in estimating the difference in mean number of daily training hours for men and women athletes on college campuses. It wants 95 percent confidence and will select a sample of 10 men and 10 women for the study. The variances are assumed equal and the populations normally distributed. The sample results are given bellow. Calculate a confidence interval for the difference between populations mean. Women Men 11-10 students 2 10 students 1 2.7 hours 1 30 hours x2 2.4 hours .40 hours

Answer 1