Furnace repair bills are normally distributed with a mean of

Last updated: 8/8/2022

Furnace repair bills are normally distributed with a mean of 269 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find the probability that they have a mean cost between 269 dollars and 271 dollars. 0.7881 0.2881 0.5517 0.2119