Answer Happy

19 12 13 10 a. Suppose the population mean life is 1500 hours. What is the probability that the sample mean life will be between 1495 and 11 1525 hours? Keep at least 4 decimal places. (Hint: consider the sampling distribution of the mean in Ch.7 where in theory we can select many random samples of size n to build the sampling distribution with the mean of the sample mean equal to the population mean. So, based on the sampling distribution, we can estimate the probability of a randomly selected sample having a sample mean service life between 1495 and 1525 hours, assuming that we have a mean of the sample mean of 1500 hours with the population standard deviation and the sample size given in the story of the uni 14