Question

Use the following data set to answer question 8:

13, 19, 7, 12, 21, 18, 15 8.

Predict how the mean will change if the 7 is deleted from the data set. Calculate the new mean. Round to the nearest tenth.​

Answer 1

15.1 to nearest tenth.

Explanation:

The 7 is the lowest number so the mean would increase if taken away.

New mean = (8 + 12 + 13 + 15 + 18 + 19+21) / 7

= 106 / 7

= 15.14