Dr. Penner thinks that she can predict a person’s success at a spatial task from

Question

Dr. Penner thinks that she can predict a person’s success at a spatial task from their Mental Ability Score (MAS). She asks 300 high-school students to complete the MAS (scores range from 10-50) and a series of spatial tasks (scores range from 0-15). She expects that with increased MAS high school students will be more successful at the spatial task.

1. What are the researcher’s independent and dependent variables?

Independent:

Dependent:

2. What are the null and alternative hypotheses (use the appropriate symbols not words)?

H0:

H1:

3. What is the appropriate test for the researcher to use? Correlation Test

4. Why is that statistic appropriate?

5. What are the test’s assumptions?

6. What are the test’s df?

7. What is the appropriate critical value?

8. If the research obtains a test statistic of ____ , would the researcher retain or reject H0?

9. Should the researcher do any follow up tests or make any graphs/charts?

10. Interpret the findings in APA style

Explanation / Answer

1. What are the researcher’s independent and dependent variables?

Independent:  Mental Ability Score (MAS)

Dependent:spatial tasks

2. What are the null and alternative hypotheses (use the appropriate symbols not words)?

H0:with increased MAS high school students will NOT be more successful at the spatial task

H1:with increased MAS high school students will be more successful at the spatial task

3. What is the appropriate test for the researcher to use?

Correlation Test,

4. Why is that statistic appropriate?

YES as both the variables are measured on a continous scale , we can check the correlation between them to see if this is signficant and is positive

6. What are the test’s df?

df for correlation is n-2

300-2 = 298

7. What is the appropriate critical value?

from the critcal value table for correlation and alpha = 0.05 and 1 tail test , we see the value as

0.095

Please note that we can answer only 4 subparts of a question at a time , as per the answering guidelines

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