Suppose you want to test the claim the paired sample data given below come from a population for which the mean difference is
.
x 77 76 68 83 85 80 50
y 83 93 81 86 69 77 62
Use a 0.05 significance level to find the following:
a. The mean value of the differences d for the paired sample data
b. The standard deviation of the differences d for the paired sample data.
c. The t-test statistic.
d. The positive critical value.