Hypothesis Tests About A Population Mean 11. The breaking strengths of ropes produced by a manufacturer have mean 1800 N and standard deviation of 100 N. By a new technique in the manufacturing...

Extracted text: Hypothesis Tests About A Population Mean 11. The breaking strengths of ropes produced by a manufacturer have mean 1800 N and standard deviation of 100 N. By a new technique in the manufacturing process it is claim that the breaking strength can be increased. To test this claim, a sample of 50 ropes is tested and it is found that the mean breaking strength is 1850 N. Can we support the claim at 0.01 level of significance ?