Exam 10: Hypothesis Tests Involving Two Population Means or Proportions

If one evaluated the average offending differences between men and women, independent samples would mean ______.

If a researcher is interested in comparing the average number of property crimes committed of those with no high school diploma against those with a high school diploma, which type of statistical analysis should be used?

When testing for a difference between proportions, a researcher would use the z-statistic instead of the t-statistic.

Matched-groups t-test is appropriate when the two samples are not independent of one another.

For Pooled and Separate variance t-tests, we must assume that the samples were independent of each other.

A researcher wishing to compare the values of parents and children collects data from 10 children and their parents. The t-test for dependent means would be the appropriate statistical analysis.

In independent random samples, both samples are randomly selected and independent of one another.

In the equations for a t-test in matched or dependent samples, $t_{a k t}=\frac{\bar{X}_{D}}{s_{D} / \sqrt{n}}$ , $\bar{X}_{D}$ is ______.

The z-test for two means is appropriate whenever the two population variances ( $\sigma_{1}, \sigma_{2}$ ) are ______.

The t-test and z-test of means is appropriate for an independent variable that has two categories and a dependent variable that is continuous.

If one can assume that two unknown population standard deviations are equal, we estimate the standard error of the difference using ______.

When is it appropriate to use the t-test for independent-samples, t-test for dependent samples, and the test for differences between two proportions?

This chapter focused upon the difference between two sample means uses and independent variable that is a ______ variable and a dependent variable that is a ______ variable

Rarely does one know the population variance.

The sampling distribution of sample mean differences is the theoretical differences between ______.

In comparing the average number of times one has driven drunk between those in Alcoholics Anonymous compared to seniors in high school, one would rely on a dependent-samples t-test.

Independent random samples are ______.

If a researcher was comparing number of arrests between male and female sibling pairs, the appropriate statistical test would be ______.

The t-test provides a formal statistical test of the null hypothesis that ______.

The t-test for two means is appropriate whenever the two population variances ( $\sigma_{1}, \sigma_{2}$ ) are ______.