1. Repeat the results from the sign test using the normal approximation. Compare the results with those obtained using the exact test.
2. In given Table, weights for two time periods on the same adults and weight loss were evaluated. Note that the tests requested here and in given Problem have smaller than recommended sample sizes to make it simpler to do with a hand calculator.
Table
Problem
Perform a Wilcoxon rank sum test on the following data on the length of time that it took to perform two types of operations. For type 1, six patients were operated on in 45,47,50,53,58, and 62 minutes. In the second type of operation it took 51, 56, 60, 63, 64, 69, and 70 minutes. Use the normal approximation.