You Are Interested in Determining the Difference in Two Population

Multiple Choice

You are interested in determining the difference in two population means.You select a random sample of 8 items from the first population and 8 from the second population and then compute a 95% confidence interval.The sample from the first population has an average of 12.2 and a standard deviation of 0.8.The sample from the second population has an average of 11.7 and a standard deviation of 1.0.Assume that the values are normally distributed in each population and that the population variances are approximately equal.The corresponding critical t value is ______.

A) 1.753
B) 1.761
C) 2.120
D) 2.131
E) 2.145