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 64 business students over a one-week period. Assume the population standard deviation is 1.6 hours. With a .95 probability, the margin of error is approximately
A) .392.
B) 1.96.
C) .20.
D) 1.645.

Question

Quizplus · Accepted Answer

The margin of error (E) can be calculated using the formula E = Z * (σ/√n), where Z is the Z-score corresponding to the confidence level (1.96 for 95%), σ is the population standard deviation, and n is the sample size. Plugging in the given values: E = 1.96 * (1.6/√64) = 1.96 * 0.2 = 0.392.

In Order to Estimate the Average Time Spent Per Student