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:

Precision

The degree to which repeated measurements under unchanged conditions show the same results.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter, expressed with a certain level of confidence.

Confidence Level

The probability, expressed as a percentage, that a parameter lies within a specified range of values, indicating the reliability of an estimate.

Confidence Interval

A span of numbers that holds a certain likelihood of containing the actual value of the parameter.