Question

Is the private value from 4(l) or the public value from 4(m) a larger value in general?  How can you tell?  Compare the z-scores to answer this question in a sentence.

4l)

For  Private student-teacher ratio

Mean =12

Std. deviation = 3

Given, value = 20

Z = (value-mean)/std.deviation  = (20-12)/3 = 2.67

a "z-score of 2.67 mean is that private student-teacher ratio is  2.67 standard deviations above the mean.

4m)

For public student-teacher ratio

Mean = 17

Std.deviation = 3

Given, value = 20

Z  = (value-mean)/std. deviation = (20-17)/3 = 1

A z-score of 1 indicates that public student-teacher ratio is 1 standard deviation about the mean.

Answer 1