View Full Version : The normal distribution: mean wt of rock loads is 46 tons

04-08-2008, 09:09 PM
please help me get started. my question is:

the mean weight of loads of rock is 46.o tons with a standard deviation of 8.0 tons. If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 44.24 tons. assume that the variable is normally distributed.

04-09-2008, 05:09 AM
Start by computing the proper z-score, remembering that you are dealing with a sample mean.