Practice Writing Null and Alternate Hypotheses

What is a plausible null hypothesis for the following research question? How does fertilizer affect the growth of tomato plants? If you add fertilizer then there will be an increase in the growth of tomato plants. If you add fertilizer then there will be a decrease in the growth of tomato plants. If you add fertilizer then there will be no difference in the growth of the tomato plants. What might an alternative hypothesis be for the following research question. How does fertilizer affect the growth of tomato plants? If you add water then you will increase the growth of the tomato plants. If you add fertilizer then the growth of the tomato plants will increase. If you add fertilizer then there will be no difference in the growth of the tomato plants. A researcher wants to know if adding fertilizer has an affect on the growth of tomato plants. What is the dependent variable? A researcher wants to know if adding fertilizer has an affect on the growth of tomato plants. What is the independent variable? A researcher wants to know if giving vitamin pills to expectant mothers will affect the birth weight of the babies. Write your Null Hypothesis here: A researcher wants to know if giving vitamin pills to expectant mothers will affect the birth weight of the babies. Write your first Alternate Hypothesis here: A researcher wants to know if giving vitamin pills to expectant mothers will affect the birth weight of the babies. Write your second Alternate Hypothesis here: A psychologist feels that playing soft music during a test will change the results of the test. The psychologist is not sure whether the grades will be higher or lower. Write your Null Hypothesis For the research above, what would be two acceptable Alternate Hypothesis? Write both of your Alternate Hypotheses here. Cat Chow Commercial Watch the commercial and answer the questions. What is a possible research question for this commercial? Do cats prefer Cat Chow over all other foods? Do cats dance when given Cat Chow? How often should you feed a cat Cat Chow? Oscar Myer Bologna Commercial Watch the commercial and answer the questions Write a Null Hypothesis for this commerical: Do kids prefer Oscar Meyer Bologna over all brands? Chiquita Bananas Watch the commercial and answer the questions. What is the research questions that could be used for this commercial? (Hint: What are they trying to show) Based on this commercial, what is a possible Null Hypothesis? Write your Null Hypothesis here. Write an Alternative Hypothsis, for this commercial.