1. a pollster claims that the mean amount spent on christmas gifts by an american family is $927
with a standard deviation of $200. what is the probability that the mean amount spent on
christmas gifts for a sample of 500 families differs from the population mean by less than $15?

According to a study done by de anza students, the height for asian adult males is normally distributed with an average of 66 inches and a standard deviation of 2.5 inches. suppose one asian adult male is randomly chosen. let x = height of the individual. a) give the distribution of x. x ~ b) find the probability that the person is between 64 and 69 inches. write the probability statement. what is the probability?