Consider the probability that greater than 93 out of 157 software users will not call technical support. Assume the probability that a given software user will not call technical support is 60% .Approximate the probability using the normal distribution. Round your answer to four decimal places.

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean