A.Your research group is doing a study on the possible effect of a new drug on ADHD symptoms. Which of the following is a non-directional alternative hypothesis?

1.None of the answers given is correct because there is no such thing as a non-directional alternative hypothesis.

2.People who take the drug will have a different level of symptoms than people who do not take the drug.

3.People who take the drug will have more symptoms than people who do not take the drug.

4.People who take the drug will have less symptoms than people who do not take the drug.

B.The preschool near your house is interested in whether children who learn to read in preschool do better in 1st grade than those who learn to read in kindergarten. For this study, what is the null hypothesis?

1.There will be no difference in success rates among children who learn to read in preschool and those who learn to read in kindergarten.

2.This study does not have a null hypothesis.

3.There will be a difference in success rates among children who learn to read in preschool and those who learn to read in kindergarten.

4.Either of the answers given could be the null hypothesis.

C.Under what circumstances should we reject the null hypothesis?

1.When the sample mean that we found would be likely in the null hypothesis population

2.When the sample mean that we found would be unlikely in the alternative hypothesis population

3.When the sample mean that we found would be likely in the alternative hypothesis population

4.When the sample mean that we found would be unlikely in the null hypothesis population

Please can you help me answer A&B&C got stuck on them please and thank you