Quiz: Setting Up Hypothesis Tests

Use the three questions below to test your knowledge on setting up hypothesis tests.

QUIZ QUESTION: :

Use your knowledge of hypothesis testing to match each statement to the hypothesis it describes.

ANSWER CHOICES:

SOLUTION:

Consider the following statement:

"Dyson air purifiers are the best."

Which set of hypotheses could accurately test this statement?

Null: Dyson air purifiers are not the best. Alternative: Dyson air purifiers are not the best.

Null: Dyson air purifiers are the best. Alternative: Honeywell air purifiers are not as good as Dyson air purifiers.

Null: Dyson air purifiers are not the best. Alternative: Dyson air purifiers are the best.

It's impossible to set up null and alternative hypotheses based on the above statement.

SOLUTION:

Null: Dyson air purifiers **are not** the best. Alternative: Dyson air purifiers **are** the best.

Consider the following statement:

"The average height of a human is smaller than or equal to 70 inches."

Which set of hypotheses below is correctly set up based on this assertion?

Null: The average height of a human is greater than 70 inches. Alternative: The average height of a human is smaller than or equal to 70 inches.

Null: The average height of a human is greater than 70 inches. Alternative: The average height of a human is not greater than 70 inches.

Null: The average height of a human is not greater than 70 inches. Alternative: The average height of a human is greater than 70 inches.

It's impossible to set up null and alternative hypotheses based on the above statements.

SOLUTION:

Null: The average height of a human is not greater than 70 inches. Alternative: The average height of a human is greater than 70 inches.