Suppose a sample of 16 wires is selected and each is tested to determine tensile strength (N/mm2). The resulting sample mean and standard deviation are 2150 and 40, respectively.(a) The mean tensile strength for springs made using spinner straightening is 2100 N/mm2. What hypotheses should be tested to determine whether the mean tensile strength for the roller method exceeds 2100? (0.5 point)(b) Assuming that the tensile strength distribution is approximately normal, what test statistic would you use to test the hypotheses in part (a)? What is the p-value in this case, and what would you conclude at significance level α =0.05? (1 point)
