Word problem for algebra 2

Question

a normally distributed set of 862 values has a mean of 132 and a standard deviation of 9. what is closest to the number of values expected to be above 145

Answer 1

You could start by calculating a z-score for 145

 

z = (145 - 132) / 9

 

z = 1.444

 

You could use a table or your graphing calculator to calculate the percentage above that z-score.

 

Then multiply the percentage by 862 (the number of values) to get the number of values above 145.