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words.

1)

Different people serve in the control and experimental groups in a ANSWER design. 

2)

Which threat to internal validity best accounts for having a large natural disaster unexpectedly affecting the majority of participants during a study? 

ANSWER

3)

Which threat to internal validity best describes natural cognitive development over the course of the study being responsible for the results? 

ANSWER 

4) 

In experimental design, the manipulated variable is the ANSWER variable.

5)

A ANSWER replication tests the same concepts using different methods, manipulations, or measures. 

6)

Random ANSWER helps one obtain a sample that is representative of the population and random ANSWER ensures the two groups are as equivalent as possible. 

7)

The ANSWER estimates how large a role the independent variable has on the dependent variable, regardless of sample size. 


8)

A study must have ANSWER validity for the results to be meaningful, and ANSWER validity to ensure results can be generalized. 




Scenario A: An experimental study was used to examine whether time of daily announcements impact worker productivity. A factory with two facilities with similar worker productivity percentages participated in the study. One facility did daily announcements at the start of each shift; the other facility did daily announcements an hour before the end of a shift. Worker productivity percentages were compared between the two facilities. 

Use this scenario to answer the following question.

9)

What is the independent variable?

Answer: 

10)

What is the dependent variable?

Answer: 

11)

What is the null hypothesis? 

Answer: 

12)

What is the alternative/research hypothesis? 

Answer: 

13)

If they reported t (30) = 1.95, using your Appendix, what is tcv? 

Answer: 


14) 

What should the researcher conclude about the null hypothesis? (Fail to reject or reject?)

Answer: 

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