The following frequency table summarizes the ages of 60 shoppers at the local grocery store. 
The sample mean for the above frequency table is calculated as 36.25.Calculate the approximate sample standard deviation for this data set.
Definitions:
Toys
Toys are objects designed for play, often used by children and pets to provide entertainment, stimulation, and aids in learning and development.
Put Away
To place something in its designated spot or to store it out of sight.
Discriminative Stimulus
A cue or signal in the environment that indicates the availability of reinforcement or punishment, guiding behavior in operant conditioning.
Operant Conditioning
An approach to learning in which behavior modification is achieved through positive reinforcement or negative punishment.
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