Module 12 Practice Questions (2)

Front

What does a P-value indicate?

Back

The probability of obtaining the results (or one more extreme) if the null hypothesis is true.

Front

How is the Chi-Square test statistic calculated?

Back

Using the observed and expected counts.

Front

Given an observed count of 60 and an expected count of 50, what is the contribution to the Chi-Square test statistic?

Back

2.00

Front

What is the expected count of pierced males in a study with 1,000 students?

Back

233.28

Front

What are the appropriate hypotheses if the correlation coefficient is r = -0.91?

Back

Null: Steroid use and sports are not linearly related. Alternative: Steroid use and sports are linearly related.

Front

When is the expected count valid?

Back

All expected counts are at least 5.

Front

What is the null hypothesis in hypothesis testing?

Back

The statement that there is no effect or no difference.

Front

What is the alternative hypothesis in hypothesis testing?

Back

The statement that there is an effect or a difference.

Front

What does a correlation coefficient of -0.91 indicate?

Back

A strong negative linear relationship between two variables.

Front

What is the purpose of the Chi-Square test?

Back

To determine if there is a significant association between categorical variables.