The mean number of words per minute (WPM) typed by a speed typist is 122 with a variance of 121
what is the probability that the sample mean would differ from the population mean by greater than 1.5 WPM if 36 speed typists are randomly selected?
what is the probability that the sample mean would differ from the population mean by greater than 1.5 WPM if 36 speed typists are randomly selected?