State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the

Question:

State the null hypothesis, Ho, and the alternative hypothesis, Ha, that would be used to test the following statements.
a. Post–self-esteem survey scores were higher than pre–self-esteem survey scores.
b. People prefer the taste of the bread made with the new recipe.
c. There is no change in weight from weigh-in until after 2 weeks of the diet.