compute an independent t test for problems to determine whether a statistically significant difference exists between the two groups in question. Use an a-level of .05 and a two-tailed test . Perform the computations for problems both by hand and using SPS compute a Wilcoxon matched pairs test instead. 2. A food company wants to know which type of salad would be best received by its customers. It sets up an experiment in which 10 people are given two types of salads: type A and type B. Each salad is carefully weighed at exactly 15 oz. After 20 minutes, the remainder of the salad is weighed, and the amount of each type of salad remaining for each person is calculated. It is assumed that subjects would eat more of the type of salad they prefer. Which salad was preferred? Here are the data. Subject Number Salad A (Ounces Left) Salad B (Ounces Left) 1 12 11 2 3 4 5 6 5 7 15 15 13 12 4 13 2 5 7 13 14 8 10 11 9 4 15 10 6 10