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.The point estimate for the difference in means of these two populations is ______.

A) −0.2
B) 0.2
C) 0.5
D) −0.5
E) 0.06