Problem 1. Suppose .1121, . . .,;1:21 are 21 random samples from N(,u,cr2), and the data are 0.810,0.593, 1.706, 1.138, 0.350,0.693, 1397,0784, 0.438, 1.699, 1.723, 2.767, 0.646, 0.920, 2.605, 1.516, 0.286, 2.573, 1.176, 0.770, 2.019. (a). We want to use Ttest to test H0:;1=1 v.5. H1441 7E1. Compute the p.vaiue of the Ttest. (b). Construct the 95% condence interval of p. and then use it to construct a test whose size is 0.05. What is your decision