A sample of non-English majors at a selected college was used in a study to see if the student retained more from reading a 19 th- century novel or by watching it in DVD form. Each student was assigned one novel to read and a different one to watch , and then they were given a 20-point written quiz on each novel. The test results are shown below.

Book90868076908892908094

DVD75767078807882857284

Assume the variables are normallydistributed. (Consider the difference D= Book - DVD)

A.At = 0.10, can it be concluded that the book scores are higher than the DVD scores?

a) State the hypotheses and identify the claim with the correct hypothesis.

1.

H₀:_D=0

H₁:_D0

2.

H₀:_D= 0

H₁:_D<0(claim)

3.

H₀:_D= 0

H₁:_D>0 (claim)

b) Find the critical value (s).

1. CV=1.833

2. CV= 1.383

3. CV= -2.821

c) Compute the test value:

1.TV= 6.11

2. TV=4.11

3. TV= 1.11

d) Make the decision.

1. Reject the null hypothesis.

2.Do not reject the null hypothesis.

e) Summarize the results.

1. There is not enough evidence to support the claim.

2.There is enough evidence to support the claim.

B. Find the 90% confidence interval for the difference between the two means.

1. 5.56< _D<12.44

2. 6.65< <10.55

3. 6.02< <11.18