What Are We Stating If We Reject the Null Hypothesis

question 26

Multiple Choice

What are we stating if we reject the null hypothesis for the independent-samples t-test?

• A)The sample mean difference represents no difference between two population μs.
• B)The sample mean difference represents a difference between two population μs that is not zero.
• C)The sample mean difference is zero.
• D)The difference between the population means is zero.

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Definitions:

Mean Absolute Deviation

The average of the absolute differences between each data point and the mean of the data set.

Root Mean Square Error

A measure of the differences between values predicted by a model and the values actually observed, expressed as the square root of the mean of these differences squared.

Seasonal Effect

A pattern observed in time-series data where changes occur at regular intervals due to seasonal factors.

Delphi Method

A structured communication technique, originally developed as a systematic, interactive forecasting method which relies on a panel of experts.