A quick check to see how good you are at Pearson's r and Scatterplots

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You are a researcher who would like to understand the relationship between GRE verbal scores and GPA in graduate school. You recruit graduate student participants who have taken the GRE verbal test and who have been in graduate school for 1 year. You ask each student to report their GRE Verbal Score. You also ask each student to report their current graduate GPA. The following is a data set that you have collected.

 

Participant

GRE Verbal Score

Current graduate GPA

Participant 1

Participant 2

Participant 3

Participant 4

Participant 5

Participant 6

Participant 7

Participant 8

Participant 9

Participant 10

Participant 11

Participant 12

Participant 13

Participant 14

Participant 15

450

720

510

470

640

800

750

500

550

570

470

620

700

800

550

3.7

3.3

3.4

3.6

3.2

3.0

3.2

3.6

4.0

3.9

3.5

3.3

3.2

3.5

3.3

 

1. Compute Pearson’s r and generate a scatterplot in SPSS for the data set above.

 

2. Based on your experimental design, report the type of test used and what it was used to test by filling in the blanks of the following sentence.

 

 

“A ________________________________________ was computed to assess the

 

relationship between _____________________ and ____________________.”

 

 

3. Based on your SPSS output and the design of this experiment, fill in the blanks in the following sentence and circle correlation or no correlation.

 

 

“There was a correlation (no correlation) between the two variables [r = _______, n

 

=_______,  p = ________].” 

 

 

3. Make reference to your scatterplot by filling in the blank below.

 

 

“A scatterplot summarizes the results (Figure ___________)”

 

 

4. Write a sentence that states what your results mean – in words that an inexperienced scientific reader could understand.

 

Background | Enter Data | Analyze Data | Interpret Data | Report Data

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