The letters from the word "alert" are used to form a password into a school computer system. How many 5-letter passowrds can be
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Answer:
Population variance 579
Population standard deviation 24
Step-by-step explanation:
The average estimated hours a person in the United States spent playing video games per year from 2002 to 2012 were 71, 80, 82, 78, 80, 91, 107, 121, 125, 131, and 142.
The population variance is given by:
This implies that:
to the nearest whole number
The population standard deviation is
to the nearest whole number.