Refer to Exercise 15.16 and data set EX1516. The data in this table are from a paired-di...

Refer to Exercise 15.16 and data set EX1516. The data in this table are from a paired-difference experiment with n = 7 pairs of observations.

a. Use Wilcoxon’s signed-rank test to determine whether there is a significant difference between the two populations.

b. Compare the results of part a with the result you got in Exercise 15.16. Are they the same? Explain.

Reference:

A paired-difference experiment was conducted to compare two populations. The data are shown in the table. Use a sign test to determine whether the population distributions are different.

a. State the null and alternative hypotheses for the test.

b. Determine an appropriate rejection region with α≈ .01.

c. Calculate the observed value of the test statistic.

d. Do the data present sufficient evidence to indicate that populations 1 and 2 are different?