In Order to Estimate the Average Time Spent Per Student

question 23

Multiple Choice

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.If the sample mean is 9 hours, then the 95% confidence interval is

• A) ​7.04 to 10.96 hours.
• B) ​7.36 to 10.64 hours.
• C) ​7.80 to 10.20 hours.
• D) ​8.61 to 9.39 hours.

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Definitions:

Evolutionary Theory

A scientific theory that explains the diversity of life on Earth through processes of natural selection and genetic variation.

Control Group

In experimental research, the group of participants that does not receive the experimental treatment, used as a baseline to compare the effects of the treatment on the experimental group.

Confound

A variable that influences both the dependent and independent variables in an experiment, making it difficult to determine the exact effect of the independent variable.

Critical Thinking

Making reasoned judgments about claims.