Question

text messages sent
what is the mean of this population? the sum of all the messages sent by the students is 384.
calculate the mean number of texts sent by a student on the given day. (round your answer to the nearest whole number.)
13
15
38
77
5 7 20 10 4
4 100 5 15 40
6 1 25 12 0
25 3 1 7 10
0 17 25 38 4

Explanation:

Step1: Count number of students

Count the number of cells in the table. There are 25 cells, so $n = 25$.

Step2: Apply mean formula

The formula for the mean $\bar{x}=\frac{\sum x}{n}$. We know $\sum x = 384$ and $n = 25$. So $\bar{x}=\frac{384}{25}=15.36$.

Step3: Round the result

Rounding 15.36 to the nearest whole number gives 15.

Answer:

15