A Researcher Want to Test If a Cause-Effect Relationships Exists

question 18

Multiple Choice

A researcher want to test if a cause-effect relationships exists between someone's age and the number of hours of sleep someone needs.She measures age as follows: 0 < 20 years.
0 20 - 50 years.
0 > 50 years.
Furthermore,participant of the research can fill in the number of hours they sleep on average in a day on a dotted line.
Which test could best be used to test the hypothesis that age influences the number of hours someone sleeps?

• A)A independent samples t-test.
• B)A paired samples t-test.
• C)ANOVA.
• D)Discriminant analysis.

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Definitions:

Regression Parameters

Coefficients that describe the relationship between independent variables and the dependent variable in regression analysis.

Square Feet

A unit of area measurement in the imperial system, equal to the area of a square with sides one foot in length.

Standard Error Of Estimate

A measure of the accuracy of predictions made with a regression model, specifically, it estimates the standard deviation of the error term.

Covariance

A measure that indicates the extent to which two variables change together. If the greater values of one variable mainly correspond with the greater values of the other variable, and the same holds for the lesser values, the covariance is positive; otherwise, it is negative.