The population standard deviation is defined as the . a. ...

[JMatthes]

The population standard deviation is defined as the .
 
  a. population variance divided by the size of the population
  b. population variance divided by the size of the population minus one
  c. square root of the population variance
  d. population variance squared

Question 2

In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh.
 
  Find , which is the consumption level separating the bottom 45 from the top 55.
  A) 1021.7 B) 1087.8 C) 1148.1 D) 1078.3

[cascooper22]

Answer to Question 1

C

Answer to Question 2

A

[JMatthes]

Excellent

[ricroger]

TYSM