Which of the Following Statements Is True

question 18

Multiple Choice

Which of the following statements is true?

• A) If the confidence interval estimate for the regression slope coefficient, based on the sample information, crosses over zero, the true population regression slope coefficient could be zero.
• B) R-square will tend to be smaller than the adjusted R-squared values when insignificant independent variables are included in the model.
• C) The y-intercept will usually be negative in a multiple regression model when the regression slope coefficients are predominately positive.
• D) None of the above

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Definitions:

Measure of Variability

A measure of variability is a summary statistic that represents the amount of dispersion in a dataset, examples include range, variance, and standard deviation.

Measure of Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution of data, such as the mean, median, or mode.

Statistic

A numerical value that summarizes or describes an aspect of a sample.

Parameter

A measurable characteristic that describes an aspect of a population in statistical analysis.