Question

A group of 7 students was asked, "How many hours did you watch television last week?" Here are their responses.

12, 5, 14, 6, 17, 7, 15
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Find the mean number of hours for these students.
If necessary, round your answer to the nearest tenth.

Answer 1

10.9

Explanation:

The "mean" is just school's fancy way of saying "the average". To find the mean of the numbers, you add them all up first. 12 + 5 + 14 + 6 + 17 + 7 + 15 = 76. The next step is to divide 76 by the number of values that were added. 12, 5, 14, 6, 17, 7, and 15 are a total of 7 numbers. So, we will divide 76 by 7.

76/7 = 10.8571428571, which rounds to 10.9 if you are rounding it to the nearest tenth.

Answer 2

`\boxed {\boxed {\sf 10.9 \ hours }}`

Explanation:

The mean is also called the average. It is a measure of central tendency and provides information about the center of a data set.

The mean is found by adding up all the values, then dividing by the number of values. Remember, this is the data set we have:

12, 5, 14, 6, 17, 7, 15

1. Add up values

12 + 5+ 14 + 6 + 17 + 7 + 15= 76

2. Divide by the number of values

• There are 7 values ( 1 for each student)

76/7=10.8571428571

3. Round

• We need to round our answer to the nearest tenth. The 5 in the hundredth place tells us to round the 8 up to a 9.

10.8571428571 ≈ 10.9

The mean number of hours spent watching television for this group of students is 10.9 hours.