The Null Hypothesis for an Independent Groups T Test States

question 82

Multiple Choice

The null hypothesis for an independent groups t test states that _____.

• A)the population mean scores for each level of the independent variable are the same
• B)the two groups have different population means on the dependent variable
• C)the independent and dependent variables are related
• D)the population variances are the same

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Definitions:

Correlational Method

A statistical technique used to determine the degree to which two variables are related without inferring a cause-and-effect relationship.

Confounding Variable

An extraneous variable in an experimental design that correlates with both the dependent and independent variables, potentially leading to a false assumption of causality.

Experimental Approach

A research method involving the manipulation of variables to observe and measure the effects on subjects in a controlled setting.

Manipulation of Variable

The process in experimental research of changing one variable to determine if changes in one variable cause changes in another variable.