An Administrator Believes That the Placement of Motivational Posters on the Walls

question 111

Multiple Choice

An administrator believes that the placement of motivational posters on the walls in classrooms of academic buildings will lead to better grades at his school.To test his theory,he randomly assigns certain classrooms within the university's Faculty of Science to have the posters while others do not.None of the remaining four faculties will have any posters placed in their classrooms.What is the independent variable in this study?

• A)the five different faculties
• B)the presence or absence of classroom posters
• C)the classrooms
• D)student grades

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Definitions:

Margin of Error

The maximum expected difference between the true population parameter and a sample estimate of that parameter.

Mean

The average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

T Distribution

A probability distribution used in statistical analysis that compares sample data to the standard normal distribution, especially useful when the sample size is small.

Population Standard Deviation

The standard deviation of a set of values that includes an entire population.