The Null Hypothesis
Instructions: In each row, select the word(s) to identify the null hypothesis.

How do three age groups compare with respect to blood pressure?
Null hypothesis: Zero the difference between group means.

Does blood pressure (Y) increase with hours of exercise (X)?
Null hypothesis: The slope of the line is .

Does an ancient coin give a fair flip?
Null hypothesis: The probability of "heads" one half.

Are blood type and gender related?
Null hypothesis: of the two variables.