# (Solved): The breaking strengths of cables produced by a certain manufacturer have historically had a mean of ...

The breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1750 pounds and a standard deviation of 55 pounds. The company believes that, due to an improvement in the manufacturing process, the mean breaking strength, \mu , of the cables is now greater than 1750 pounds. To see if this is the case, 90 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1766 pounds. Can we support, at the 0.01 level of significance, the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1750 pounds? Assume that the population standard deviation has not changed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H_0 and the alternative hypothesis H_1. [ H_0:; H_1: ] (b) Determine the type of test statistic to use. (c) Find the value of the test statistic. (Round to three or more decimal places.) /r/n (d) Find the critical value. (Round to three or more decimal places.) (e) Can we support the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1750 pounds? Yes No

We have an Answer from Expert