z scores and percents

Question

below are the standard deviation for johns and bobs height, find the % of data below each of their given z- values to determine what percent of people are shorter than they are. Z= 2.24, Z= -1.65

Answer 1

From the Z table

 

1. % of data less than a Z score of 2.24 is 0.9875

 

2. % of data less than a Z score of -1.65 is 0.0495