A staff psychologist at a police precinct developed a week-longtraining course designed to improve on the job sensitivity ofpolice officers. The psychologist designs a study where somepolicemen randomly get and complete the course. A month later thepsychologist records the number of domestic disputes the policeofficers successfully resolved from their police reports. What canthe psychologist conclude with an α of 0.05. The success data arebelow.
no
course | course |
|---|
11.2
12.5
10.6
12.7
8.3
15.6
12.1 | 14.8
16.3
14.3
17.4
11.2
16.5
15.4 |
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-testRelated-Samples t-test
b)
Condition 1:
---Select--- no course police precinct domestic disputes completingthe course job sensitivity
Condition 2:
---Select--- no course police precinct domestic disputes completingthe course job sensitivity
c) Compute the appropriate test statistic(s) tomake a decision about H0.
(Hint: Make sure to write down the null and alternative hypothesesto help solve the problem.)
p-value =Â Â ; Decision:Â Â ---Select---Reject H0 Fail to reject H0
d) , compute the corresponding effect size(s) andindicate magnitude(s).
If not appropriate, input and/or select \"na\" below.
d =Â Â ; Â Â ---Select--- na trivialeffect small effect medium effect large effect
r2 =Â Â ; Â Â ---Select--- natrivial effect small effect medium effect large effect
e) Make an interpretation based on theresults.
Participants that received training had significantly lessresolved domestic disputes than those that did not receivetraining.
Participants that received training had significantly moreresolved domestic disputes than those that did not receivetraining. Â
  Participants that received training did not differsignificantly on resolved domestic disputes than those that did notreceive training.
