Question

the sample means for three samples of 20 are shown in the table. compute the variation of each predicted population mean from the sample means in the table.

sample	sample mean	actual mean
sample 1	12	10.5
sample 2	8	10.5
sample 3	16	10.5

Explanation:

Step1: Recall the formula for variation

Variation = |Sample Mean - Actual Mean|

Step2: Calculate variation for Sample 1

|12 - 10.5| = 1.5

Step3: Calculate variation for Sample 2

|8 - 10.5| = 2.5

Step4: Calculate variation for Sample 3

|16 - 10.5| = 5.5

Answer:

Sample 1: 1.5
Sample 2: 2.5
Sample 3: 5.5