Use the normal distribution of fish lengths for which the mean is 9 inches and the standard deviation is 2 inches. assume the variable x is normally distributed. (a) what percent of the fish are longer than 14 inches? (b) if 300 fish are randomly selected, about how many would you expect to be shorter than 8 inches?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?