Question

the means and mean absolute deviations of the amount of rain that fell each day in a local city, last week and this week, are shown below.

means and mean absolute deviations of rainfall last week and this week
mean	19.7 cm	19.3 cm
mean absolute deviation	4.6 cm	5.2 cm

the difference in the mean rainfall is approximately what percent of the mean absolute deviation of the this weeks rainfall?
8%
23%
27%
67%

Explanation:

Step1: Calculate the difference in mean rainfall

$|19.7 - 19.3|= 0.4$

Step2: Calculate the percentage

The formula for percentage is $\frac{\text{difference}}{\text{mean absolute deviation of this - week}}\times100\%$. So, $\frac{0.4}{5.2}\times 100\%=\frac{40}{5.2}\% \approx 7.69\% \approx 8\%$

Answer:

8%