1. An electrical engineer must design a circuit to deliver the maximum amount of current to a display tube to achieve sucient image brightness. Within her allowable design constraints, she has developed two candidate circuits and tests

Delta: 13, 10, 1, 4, 0, 9 (minutes late)

Alaska: 15, 8, 3, 1, 2, 4 (minutes late)

The manufacturer of a hot tub is interested to test prototypes of each. The resulting data (in microamperes) are as follows:

Circuit 1: 251, 255, 258, 257, 250, 251, 254, 250, 248

Circuit 2: 250, 253, 249, 256, 259, 252, 260, 251

1. Use the Wilcoxon rank-sum test to test H0: 1 = 2 against the alternative H1: 1 > 2. Use = 0.025.
2. Use the normal approximation for the Wilcoxon rank- sum test. Assume that = 0.05. Find the approximate P-value for this test statistic.