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, then the critical value will be t = 2.1009.

Question

Quizplus · Accepted Answer

For a two-sample t-test with equal variances and a 95% confidence level, the degrees of freedom is n1 + n2 - 2 = 18. The critical t-value for 18 degrees of freedom at a 95% confidence level (two-tailed) is approximately 2.1009.

The Cranston Hardware Company Is Interested in Estimating the Difference