Exam 8: Data Analysis and Statistical Methods: Univariate and Bivariate Analyses

The effects of sample size can be corrected for by taking the SS_XY value for variables X and Y and _______________ to calculate the "covariance."

The linear correlation coefficient measures the

Normal distributions are bimodal.

Simple regression is appropriate for determining how

In a regression equation,the slope indicates the

A "two-tailed test" is used to test the alternative hypothesis that a sample statistic is less than a particular value.

The appropriate measure of dispersion for interval data is

Because hypotheses are always tested with data from a sample,there will always be some sampling error.

In general,the degrees of freedom (df )is the size of the sample (n)

The _______________ is an appropriate measure of central tendency for interval data and is by far the most widely used measure in all of statistics.

In hypothesis testing,the null hypothesis is stated as a population parameter being

In examining the relationship between two variables,if r = -1,then the relationship is

The median is not applicable for

Relative and absolute frequencies are appropriate measures of dispersion for nominal data.

Bivariate analysis would be needed to answer all of the following questions except:

The power of a hypothesis test is described as the probability of

In hypothesis testing,the Greek letter beta ( $\beta$ )refers to

For questions #20 through 24 relate back to this situation: A product manager is concerned with whether or not her product's share is equal to 25 percent of the market. A sample of 35 data points yields a sample proportion equal to 38 percent. -What would be the numerator of the inferential statistical test for the hypothesis in question #20?

What is the power of the test and how does it relate to error?

A researcher will set the maximum tolerable degree of Type I error,which is referred to as the