Question

question 1
what is the mean of the data set?
10, 9, 17, 21, 11, 18, 19, 12, 18, 16
a 15
b 16
c 18

Explanation:

Step1: Find sum of data

$10 + 9+17+21+11+18+19+12+18+16=151$

Step2: Count number of data

There are 10 data - points.

Step3: Calculate the mean

Mean = $\frac{151}{10}=15.1\approx15$ (rounded to the nearest whole number as options are whole - numbers)

Answer:

A. 15