Relative Frequency of Scores

Question

Find the relative frequency of scores

a. between the mean and z = +1.40.

 

b. below z = -1.86.

 

c. above z = +2.68.

 

d. below z = -2.4 and above z = +1.96.

Answer 1

A survey asked 200 people to choose a number from 1-5. Predict the relative frequency for each number if 400 people were surveyed:

Number                    1                2               3             4             5

Frequency               24               44             54           50           28

Number of Trials 200