Refer to Exercises 10.94 and 10.95. Calculate a 95% confidence interval for the differen...

Refer to Exercises 10.94 and 10.95. Calculate a 95% confidence interval for the difference in the two population means for each of these experimental designs. Does it appear that blocking increased the amount of information available in the experiment?

Reference:Exercises 10.94

Reaction Times A comparison of reaction times (in seconds) for two different stimuli in a psychological word-association experiment produced the following results when applied to a random sample of 16 people:

Do the data present sufficient evidence to indicate a difference in mean reaction times for the two stimuli? Test using α = .05.

Reference:Exercises 10.95

Reaction Times II Refer to Exercise 10.94. Suppose that the word-association experiment is conducted using eight people as blocks and making a comparison of reaction times within each person; that is, each person is subjected to both stimuli in a random order. The reaction times (in seconds) for the experiment are as follows:

Do the data present sufficient evidence to indicate a difference in mean reaction times for the two stimuli? Test using α = .05.