Study and analyze:
The number of shoes sold per day at a retail store is shown in the table below. Illustrate the mean,
variance, and standard deviation of this distribution.
Write all the necessary formula and show the complete solution.
Formula to be used:
a. Mean b. Variance c. Standard Deviation
Solution:
() ∙ () − μ ( − ) ( − ) ∙
()
19 0.4
20 0.2
21 0.2
22 0.1
23 0.1