APFIVE Interpreting Standard Deviation of a Random Variable
Let the discrete random variable Y represent the number of customer service calls received per hour at a call center. If the standard deviation of Y is σY = 3.2 calls, which of the following statements provides the correct interpretation of this value?
A
The call center receives 3.2 calls per hour on average
B
The typical deviation from the mean number of calls per hour is 3.2 calls
C
The maximum deviation in call volume is 3.2 calls per hour
D
The call volume increases by 3.2 calls each hour
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