Question

Use SPSS for this Application Exercise:
School psychologists hypothesize that more negative externalizing behaviors are related to more anxiety (e.g., causing fights). The table below contains the response from a sample of middle school students. What can the psychologist conclude with an α of 0.05?

anxiety	neg. behavior
31 24 20 15 34 27 20 29 17 22 21 26	5 7 7 10 2 7 11 6 9 6 9 3

a) What is the appropriate statistic?
---Select--- na Correlation Slope Chi-Square
Compute the statistic selected in a):  

b) Input the appropriate value(s) to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
p-value =  ; Decision:  ---Select--- Reject H0 Fail to reject H0

c) Using the SPSS results, compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
effect size =  ;    ---Select--- na trivial effect small effect medium effect large effect

d) Make an interpretation based on the results.

There is a significant positive relationship between negative externalizing behaviors and anxiety.

There is a significant negative relationship between negative externalizing behaviors and anxiety.     

There is no significant relationship between negative externalizing behaviors and anxiety.

Answer 1

a) What is the appropriate statistic?
Correlation
Compute the statistic selected in a): -0.815

b) Input the appropriate value(s) to make a decision about H₀.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
p-value = 0.001 ; Decision: Reject H0

c) Using the SPSS results, compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
effect size = 0.664; medium effect

d) Make an interpretation based on the results.

There is a significant negative relationship between negative externalizing behaviors and anxiety.     

The SPSS output is: