t-tests

What t-test would be used for: Does a course offered to college seniors result in a GRE score greater or equal to 1200?

A one-sample t-test would be used for - Does a course offered to college seniors result in a GRE score greater or equal to 1200?

Why would a one-sample t-test be used to test if a course offered to college seniors results in a GRE score greater or equal to 1200?

A one-sample t-test would be used to test if a course offered to college seniors results in a GRE score greater or equal to 1200 because the sample mean is compared to a single fixed value.

What t-test would be used for: students' scores on the first quiz vs. the same students' scores on the second quiz?

A paired-samples t-test would be used for the students' scores on the first quiz vs. the same students' scores on the second quiz.

What t-test would be used for: the difference between males and females on an exam score?

An independent samples t-test

For independent-samples t-tests, in SPSS, the grouping variables are usually ____________ variables.

For _______________ t-tests, in SPSS, the ____________ variables are usually discrete variables - meaning there are exactly two levels of the variable (pass/fail). Continuous variables can be used if divided into two levels.

For independent-samples t-tests, in SPSS, the test variables are _____________ variables.

For _________________ t-tests, in SPSS, the __________ variables are continuous variables.

Why would an independent samples t-test be used for the difference between males and females on an exam score?

An independent samples t-test would be used for the difference between males and females on an exam score because there is no overlapping membership between the "male" and "female" groups.

Heteroschedasticity is the ____________ test.

f-value

Why would a paired-samples t-test be used for students' scores on the first quiz vs. the same students' scores on the second quiz?

A paired-samples t-test would be used for the same students' scores on the first quiz vs. the same students' scores on the second quiz because the same group experiences both levels of the variable.

The three different types of t-tests are ____________

Independent sample, paired-sample, and one-sample are the three different types of _____________.

The t-value is the ______________________.

_________________ is the difference between means divided by the standard error.

The f-value is used to __________________.

_________________ is used to determine if the variances of the two distributions differ significantly with each other.

The independent samples t-test compares the means of two different samples that share _____________, but there is no __________.

___________________ t-test compares the means of two different samples that share some variable of interest in common, but there is no overlap between membership of the two groups.

The one-sample t-test is designed to test _____________

_________________ t-test is designed to test whether the mean of a distribution differs significantly from some preset value.

The paired-samples t-test is based on groups ____________________

___________________ t-test is based on groups of individuals who experience both conditions of the variables of interest.

A t-test compares samples means to see if _________________

______________ compares sample means to see if there is sufficient evidence to infer that the means of the corresponding population distributions also differ.

A t-test is a procedure used for ____________

______________ is a procedure used for comparing sample means.

When using t-tests, the test that measures the probability associated with the difference between groups

When using t-tests, the one-tailed or two-tailed test of significant measures the ______________________

The only computational value of a one-tailed and a two-tailed test of significance is _________________

The only __________________________ is that the p-value of a two-tailed is twice as much as the p-value of a one-tailed test of significance.