If a Data Set Has a Relationship That Is Best

question 97

Multiple Choice

If a data set has a relationship that is best described by a linear model, than the residual plot will

• A) have no pattern with a correlation near 0.
• B) also have a linear pattern with a similar correlation.
• C) have a curved pattern, like a parabola.
• D) be an unknown shape.
• E) none of these

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Definitions:

Significance Level

The probability of rejecting the null hypothesis when it is actually true; a threshold chosen by the researcher to indicate the level of evidence needed to reject the null hypothesis.

Kruskal-Wallis Test

A nonparametric statistical test used to compare three or more independent samples to determine if they originate from the same distribution.

P-value

The probability of obtaining a test statistic at least as extreme as the one that was actually observed, assuming that the null hypothesis is true.

Test Statistic

A value calculated from sample data during a hypothesis test that is compared to a threshold value to decide whether to reject the null hypothesis.