Concept explainers
To find: The correct interpretation of the standard deviation.

Answer to Problem T6.2SPT
Option d. is correct.
Explanation of Solution
Given information:
X is the number of puzzles completed by a randomly chosen subject.
The
Value | 1 | 2 | 3 | 4 |
Probability | 0.2 | 0.4 | 0.3 | 0.1 |
The standard deviation of X is 0.9.
Definition used:
Standard deviation is the measure of deviation of the variables from the
If the standard deviation is close to zero, then the majority of the data lies around mean and if it is high, then the data is spread.
Here, the standard deviation is 0.9 which depicts that X (number of puzzles) differed from mean by 0.9 on an average.
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