In a statistic class, 10 scores were randomly selected with the following results were obtained (mean = 71.5):
74, 73, 77, 77, 71, 68, 65, 77, 67, 66

-What is the standard deviation?
A)22.72
B)12.00
C)4.77
D)516.20
E)144.00

Question

In a statistic class, 10 scores were randomly selected with the following results were obtained (mean = 71.5):
74, 73, 77, 77, 71, 68, 65, 77, 67, 66

-What is the standard deviation?
A)22.72
B)12.00
C)4.77
D)516.20
E)144.00

Quizplus · Accepted Answer

The standard deviation is a measure of the spread of a data set. Option C (4.77) is the only choice that represents a reasonable measure of spread for most data sets. Options A, D, and E are too large and Option B is uncommonly small.

In a Statistic Class, 10 Scores Were Randomly Selected with the Following