Question

finding the mean of a population
text messages sent
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
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

Explanation:

Step1: Count total number of students

Count entries: $5 \times 5 = 25$

Step2: Use mean formula (sum/count)

$\text{Mean} = \frac{384}{25}$

Step3: Calculate and round to whole number

$\frac{384}{25} = 15.36 \approx 15$

Answer:

B. 15