Refer to Exercise 2.139. For parts a–d, determine whether

Solution :

Step 1 of 4:

Our goal is:

We need to determine whether the values 50, 70, and 80 are outliers.

We refer to exercise 2.139, we have to determine whether the values 50, 70, and 80 are outliers.

a).

Then the formula for the z-score is

z =

The measurement of x and their z-score table is given below.

From the above table the z-score lies between -3 and +3, so none of the values are outlier.

Therefore the z-score lies between -3 and, so none of the values are outlier.