Here are some summary statistics for annual snowfall in a certain town compiled over the last 15 years: lowest amount = 19 cm,mean = 47 cm,median = 40 cm,range = 81 cm,IQR = 54,Q1 = 19,standard deviation = 10 cm.Suppose snowfall was tracked for 5 additional years and the annual snowfall was found to increase by 20%.Find the new mean and standard deviation.
A)Mean: 9.4 cm,SD: 2 cm
B)Mean: 37.6 cm,SD: 10 cm
C)Mean: 56.4 cm,SD: 10 cm
D)Mean: 37.6 cm,SD: 8 cm
E)Mean: 56.4 cm,SD: 12 cm

Question

Quizplus · Accepted Answer

When all data values increase by a certain percentage, the mean increases by the same percentage, but the standard deviation also increases by that percentage. Thus, the new mean is 47 cm * 1.2 = 56.4 cm, and the new standard deviation is 10 cm * 1.2 = 12 cm.

Here Are Some Summary Statistics for Annual Snowfall in a Certain