Replacement times for TV sets are normally distributed with a mean of 8.2 years and a standard deviation of 1.1 years. Find the probability a randomly selected TV will have a replacement time less than 5 years (round to three decimal places).

The height of 10 year old females is normally distributed with a mean of 54.8 inches and a standard deviation of 2.74 inches. If a random 10 year old female is chosen at random, find the probability her height is between 53 inches and 57 inches.

A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the life of the lightbulb is normally distributed. determine the probability that a randomly selected lightbulb will last between 1000 and 1250 hours

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading between -1.24°C and 0°C.