Question

malek was celebrating his birthday. as each person entered, he recorded their age. the list below shows the ages (in years) of the people at the party. calculate the mean age of the people. round your answer to the nearest tenth of a year.
ages
11
10
14
11
13
15
14
75

Explanation:

Step1: Find the sum of ages

$11 + 10+14 + 11+13+15+14+75=163$

Step2: Find the number of data - points

There are 8 ages recorded.

Step3: Calculate the mean

The mean $\bar{x}=\frac{\text{Sum of data}}{\text{Number of data - points}}=\frac{163}{8}=20.375$

Step4: Round the result

Rounding $20.375$ to the nearest tenth gives $20.4$

Answer:

$20.4$