A Group of Statistics Students Decided to Conduct a Survey

question 2

Multiple Choice

A group of statistics students decided to conduct a survey at their university to estimate the average (mean) amount of time students spent studying per week. They sampled 554 students and found a mean of 22.3 hours per week. Assuming a population standard deviation of 6 hours, what is the 95% level of confidence?

• A) [21.80, 22.80]
• B) [16.3, 28.3]
• C) [21.64, 22.96]
• D) [20.22, 22.0]

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Definitions:

Variable Group

A set of elements or entities that are subject to change and can be measured and analyzed within a study.

Confound Group

A group in an experiment that introduces variability to the outcome, making it difficult to determine the effect of the treatment.

Experimental Group

In an experiment, one or more treatment groups of participants that receive the manipulation of the independent variable being investigated.

Random Assignment

Placing research participants into the conditions of an experiment in such a way that each participant has an equal chance of being assigned to any level of the independent variable.