Jerry took a sample of 4 employees in his office and observed how many hours they each worked one day.
Here is what he found:
Employee
Leslie
April
Tom
Andy
Hours
10
2
4
8
Jerry found their mean was i = 6 hours. He thinks the standard deviation is
8 =
(10 - 6)2 + (2 - 6) + (4 - 6) + (8 - 6)2
5
What is the error in Jerry's standard deviation calculation?