Question

estimating the mean of a population
sample | sample mean
1 | 154
2 | 121
3 | 160
4 | 135
5 | 140
6 | 134
7 | 129
looking at this table of sample means, which value is the best estimate of the mean of the population?
○ 120
○ 136
○ 160
○ 168

Explanation:

Step1: Sum all sample means

$154 + 121 + 160 + 135 + 140 + 134 + 129 = 973$

Step2: Calculate mean of sample means

$\frac{973}{7} = 139$

Step3: Match to closest option

The value closest to 139 is 136.

Answer:

B. 136