Question

In order to estimate the average time spent on the computer terminals per student, data were collected for a sample of 49 business students over a one week period. Assume the population standard deviation is 1.4 hours. The standard error of the mean is a 0.20 b 0.30 c 5 d 7

Answer 1

a 0.20

Explanation:

The standard error of the mean can be calculated using the formula

SE=
`(s)/(√(N) )` where

• s is the population standard deviation of the time spend on the computer (1.4 hours)

• N is the sample size of the data collected. (49)

Using the numbers SE=
`(1.4)/(√(49) )` =0.20