.An investigator is interested in the effects of noise on the ability of subjects to concentrate.She assigns subjects randomly to one of three Noise conditions: low noise, moderate noise, and loud noise.She administers a test of concentration while the noise is present.She predicts that there will be an overall effect of noise on the ability to concentrate.

Theory A suggests that people in the low noise condition will have higher scores on concentration than subjects in the moderate noise condition.

Theory B suggests that no difference in concentration will be observed between subjects in the moderate and loud noise groups.

Note, this is a null hypothesis statement!For theory B, the researcher wants to retain the null hypothesis.

To Do:

1.Use SPSS or Excel to determine if there is a difference (hint: ANOVA).State the test statistic for this ANOVA

2.Run the appropriate follow-up t-tests to test each of Theory A and Theory B.State the test statistic for each theory.Be sure to state whether you found evidence supporting or denying the theory.

Here is the data:

Low Noise Moderate Noise Loud Noise

10 5 6

11 4 3

13 4 3

12 5 5

13 3 6

10 5 4