Exam 12: Data Analysis: Hypothesis Testing Related to Differences, Correlation, and Regression

________ may be desirable because it is easier to compare the beta coefficients than it is to compare the raw coefficients.

The ________ is a statistic that assumes that the variable has a symmetric bell-shaped distribution and the mean is known (or assumed to be known)and the population variance is estimated from the sample.

Non-parametric tests are hypothesis testing procedures that assume the variables of interest are measured on at least an interval scale.

For a large sample size, the t distribution approaches the normal distribution.Thus, the t-test and the z-test are equivalent.

Significance testing involves testing the significance of the overall regression equation as well as specific partial regression coefficients.

All of the following are types of tests of differences EXCEPT ________.

A test for differences in the means of paired samples is called the paired samples t-test.

A hypothesis test using the t distribution, which is used when the standard deviation is unknown and the sample size is small, is called the ________.

The F statistic is computed as the ratio of two sample variances.

A procedure for deriving a mathematical relationship, in the form of an equation, between a single metric dependent variable and a single metric independent variable is called ________.

The value of the F distribution depends only upon the degrees of freedom in the numerator.

A systematic relationship between two variables in which a change in one implies a corresponding change in the other is called ________.

________ involves testing the significance of the overall regression equation as well as specific partial regression coefficients.

A t-test of sample variance may be performed if it is not known whether the two populations have equal variance.