Data Set 2A
Suppose that the ages of 8 kittens in a pet shop are as follows:
1, 2, 2, 3, 3, 4, 4, 5
-For Data Set 2A, what is the standard deviation?
A) √2
B) 1
C) 1.5
D) 2
E) √1.5

Question

Quizplus · Accepted Answer

The standard deviation is calculated by finding the square root of the variance. The variance is the average of the squared differences from the Mean. For this data set, the mean age is (1+2+2+3+3+4+4+5)/8 = 3. The squared differences from the mean are: (2, 1, 1, 0, 0, 1, 1, 4), and their average (variance) is 1.5. Therefore, the standard deviation is the square root of 1.5, which is √1.5.

Data Set 2A Suppose That the Ages of 8 Kittens in a Pet