In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.

The standard error of the mean is:

a) 7.50 b) 0.39 c) 2.00 d) 0.20

Question

Mathematics

Devyn Steele

20 February, 09:12

In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.

The standard error of the mean is:

a) 7.50 b) 0.39 c) 2.00 d) 0.20

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Answers (1)

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August Mcknight · Answer 1

Answer: option D

Step-by-step explanation:

The formulae for standard error = standard deviation/√n

But population standard deviation = 1.8 and sample size = n = 81

Standard error = 1.8/√81 = 1.8/9 = 0.2