Exercise 20-4 Algo Consider the following competing hypotheses and sample data. Use Table 1. He: m = 140 HA: m > 148 n = 40 T = 340 T* = 480 a. Assuming that the sampling distribution of 7 is normally distributed, calculate the value of the test statistic. (Round final answer to 2 decimal places.) Test statistic 0.31 b. Find the p-value. O 0.05 s p-value