Question

question 13 (5 points)
find the mean of the following set of data.

7.5, 2.1, 9.7, 3.6, 4.3, 5.1, 8.6, 9.3

7.6
6.275
5.1
6.3

Explanation:

Sum the data values

$$ \sum x = 7.5 + 2.1 + 9.7 + 3.6 + 4.3 + 5.1 + 8.6 + 9.3 = 50.2 $$

Count the number of values

$$ n = 8 $$

Calculate the mean

$$ \mu = \frac{\sum x}{n} = \frac{50.2}{8} = 6.275 $$

Answer:

• (A) 7.6
• (B) 6.275 (Correct answer)
• (C) 5.1
• (D) 6.3