Question

a simple random sample of 10 people were asked how many first cousins they have. the results are listed below.
10, 19, 20, 13, 13, 2, 10, 8, 25, 10
what is the mean number of first cousins for this sample?
○ 10
○ 11.5
○ 13
○ 13.5

Explanation:

Step1: Sum the data values

$10 + 19 + 20 + 13 + 13 + 2 + 10 + 8 + 25 + 10 = 130$

Step2: Calculate the mean

Mean = $\frac{\text{Total sum}}{\text{Number of data points}} = \frac{130}{10} = 13$

Answer:

C. 13