Question

predicting the mean of a population
the sample means for three samples of 20 are shown in the table.

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

compute the variation of each predicted population mean from the sample means in the table.

sample 1:
dropdown

sample 2:
dropdown

sample 3:
dropdown with options 1.5, 2.5, 4.5, 5.5

Explanation:

Step1: Calculate Sample 1 variation

$|12 - 10.5| = 1.5$

Step2: Calculate Sample 2 variation

$|8 - 10.5| = 2.5$

Step3: Calculate Sample 3 variation

$|16 - 10.5| = 5.5$

Answer:

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