Question

Two months ago, the mean daily rainfall in a local city was 9.4 cm. The mean absolute deviation was 3.5 cm. Last month, the mean daily rainfall in that city was 11.5 cm, and the mean absolute deviation was 1.6 cm.

Which statement about the rainfall is true?

More rain fell two months ago than last month.

About the same amount of rain fell two months ago as last month.

Last month, the amount of rain that fell each day varied about the same as the month before.

Last month, the amount of rain that fell each day varied less than the month before.

Answer 1

Last month, more rain fell compared to two months ago, and there was less variation in the daily rainfall.

Step-by-step explanation:

To determine whether more rain fell two months ago or last month, we need to compare the mean daily rainfall and the mean absolute deviation for both months. Two months ago, the mean daily rainfall was 9.4 cm with a mean absolute deviation of 3.5 cm. Last month, the mean daily rainfall was 11.5 cm with a mean absolute deviation of 1.6 cm.

Thus, based on this information, we can conclude that more rain fell last month. The mean daily rainfall was higher and the mean absolute deviation was lower. This indicates that there was less variation in the amount of rain that fell each day last month compared to two months ago.

Answer 2

C

Step-by-step explanation: