T-Test_Fall2023

Front

What information do you need to look up a critical value for a t-distribution?

Back

The degrees of freedom and the significance level.

Front

What is the critical value for a two-tailed t-test with 15 degrees of freedom at a 0.05 significance level?

Back

2.131

Front

What is the critical value for a one-tailed t-test at a 0.05 significance level with 20 degrees of freedom?

Back

1.725

Front

Which t-test would you use to compare scores of students before and after a teaching intervention?

Back

Paired sample t-test.

Front

What is the purpose of the critical value in hypothesis testing?

Back

Determining the rejection region for a test statistic.

Front

What is a t-test?

Back

A statistical test used to compare the means of two groups.

Front

What are the three types of t-tests?

Back

One-sample t-test, paired sample t-test, independent sample t-test.

Front

When is a one-sample t-test used?

Back

When comparing the mean of a single sample to a known value.

Front

What is the significance level in hypothesis testing?

Back

The probability of rejecting the null hypothesis when it is true, commonly denoted as alpha (α).

Front

What does degrees of freedom refer to in a t-test?

Back

The number of independent values that can vary in an analysis without breaking any constraints.