QUESTION 5A. Suppose a researcher wants to evaluate a self-esteem program by measuring students' self-esteem before and after the self-esteem program is administered. If all of the students score very high in self-esteem before the program begins, then the study has a sensitivity problem know as ____.

1.a floor effect

1. 2.participant reactivity
2. 3.a ceiling effect
3. 4.experimenter bias

B. The null hypothesis predicts that

1.the effect of manipulating the independent variable will follow the theoretical prediction.

2.there will be no effect of manipulating the independent variable.

3.any change in the levels of the independent variable will cause a change in the dependent variable.

4.if there are any nulls present in the independent variable, there will be at least one null in the dependent variable.

C. In a hypothesis test there is always a possibility that the patterns observed in the sample data are not caused by any systematic treatment effects, but rather are simply due to chance. However, the hypothesis test ensures that this possibility is very unlikely by establishing

1. 1.an alpha level.2.a test statistic.3.a null hypothesis.4.either a type I or a type II error.

D.If you read the following in an article in which computer science majors and english majors were compared in social skills, what would you conclude: t(25) = 3.45; p = .003, what would you conclude.

1. 1.The null hypothesis cannot be rejected2.There is a significant difference in social skills between the majors3.You cannot determine whether there is a difference in social skills between the majors4.there is no significant difference in social skills between the major