(Solved): company manufactures rope whose breaking strengths have a mean of 300 lb and standard deviation ...
? company manufactures rope whose breaking strengths have a mean of 300 lb and standard deviation 24 lb. is believed that by a newly developed process the mean breaking strength can be increased.
a) Design a decision rule for rejecting the old process at a=0.01 level of significance if number of sample rop. n=64.
b) Calculate the probability of committing a type II error with true mean equal 310 lb ? Assume the standard deviation is still 24 lb.