Module 12 Practice Questions (2)

Front

What is the null hypothesis in a study examining the relationship between gender and ear piercing?

Back

There is no relationship between gender and ear piercing.

Front

What is the alternative hypothesis in a study examining the relationship between gender and ear piercing?

Back

There is a relationship between gender and ear piercing.

Front

What does a P-value indicate in hypothesis testing?

Back

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

Front

What are the null and alternative hypotheses when testing the relationship between steroid use and sports with a correlation coefficient of r = -0.91?

Back

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

Front

What is the purpose of hypothesis testing in statistics?

Back

To determine whether there is enough evidence to reject the null hypothesis.

Front

Define 'correlation coefficient'.

Back

A statistical measure that describes the strength and direction of a relationship between two variables.

Front

What does a negative correlation coefficient indicate?

Back

As one variable increases, the other variable tends to decrease.

Front

What is a two-way table?

Back

A table that displays the frequency distribution of two categorical variables.

Front

What is the significance of a linear relationship in statistics?

Back

It indicates that there is a consistent pattern of association between two variables.

Front

What is the difference between a null hypothesis and an alternative hypothesis?

Back

The null hypothesis states there is no effect or relationship, while the alternative hypothesis states there is an effect or relationship.