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

Question

Quizplus · Accepted Answer

The point estimate for the difference in means of two populations is simply the difference in sample means, which is 12.2 - 11.7 = 0.5.

You Are Interested in Determining the Difference in Two Population