Question

suppose a normal distribution has a mean of 222 and a standard deviation of 16. what is the probability that the data value is between 174 and 238 round your answer to the nearest 10th of a percent

Answer 1

Do you use a calculator or a z-table?

First you find the z score by doing:

(174 - mean) / standard_deviation
(238 - mean) / standard_deviation

Find their probabilities


And subtract the 174 probability from the 238 probability