Statistics and Probability Quiz

What is the null hypothesis in hypothesis testing?

• The hypothesis that is proven true

• The hypothesis that is rejected

• The initial claim.

• The hypothesis that is formulated as the same as the research hypothesis

What is the alternative hypothesis in hypothesis testing?

• The hypothesis that is proven true

• The hypothesis that is rejected

• The hypothesis that is formulated as the opposite of the research hypothesis

• The contrary to the null hypothesis

What is the level of significance in hypothesis testing?

• The probability of accepting or rejecting a true null hypothesis

• The probability of accepting a false null hypothesis

• The probability of correctly rejecting a false null hypothesis

• The probability of correctly accepting a true null hypothesis

What is the rejection region in hypothesis testing?

• The region where the null hypothesis is accepted

• The region where the null hypothesis is rejected

• The region where the alternative hypothesis is accepted

• The region where the alternative hypothesis is rejected

What is a type I error in hypothesis testing?

• Rejecting a true null hypothesis

• Accepting a false null hypothesis

• Rejecting a false null hypothesis

• Accepting a true null hypothesis

What is a type II error in hypothesis testing?

• Rejecting a true null hypothesis

• Accepting a false null hypothesis

• Rejecting a false null hypothesis

• Accepting a true null hypothesis

What is a one-tailed test in hypothesis testing?

• A test that considers only one hypothesis

• A test that has a single level of significance

• A test that is conducted on one sample only

• A test that is used to test a directional hypothesis

What is a two-tailed test in hypothesis testing?

• A test that considers only two hypotheses

• A test that has two levels of significance

• A test that is conducted on two samples only

• A test that is used to test a non-directional hypothesis

A researcher wants to test if the average height of a population is different from 175 cm. What is the null hypothesis?

• The average height is equal to 175 cm.

• The average height is less than 175 cm

• The average height is greater than 175 cm.

• The average height is not equal to 175 cm.

In previous question, what is the alternative hypothesis?

• The average height is equal to 175 cm.

• The average height is less than 175 cm

• The average height is greater than 175 cm.

• The average height is not equal to 175 cm.