Examlex
To study the effectiveness of possible treatments for insomnia,a sleep researcher conducted a study in which four participants were instructed to count sheep (the Sheep Condition),four were told to concentrate on their breathing (the Breathing Condition),and four were not given any special instructions (the Control Condition).The average number of minutes taken for participants to fall asleep over the next seven days were 39,33,42,and 38 minutes for the Sheep condition; 33,25,31,and 27 minutes for the Breathing condition; and 44,41,38,and 41 for the Control condition.Using the .01 significance level,did the different techniques have different effects?
a.Use the five steps of hypothesis testing.
b.Sketch the distributions involved.
c.Figure the effect size of this study and indicate whether it is nearer to small,medium,or large.
d.Figure a planned contrast between the means for those in the Sheep Condition versus those in the Breathing Condition using the .05 significance level.
e.Conduct Scheffé's test for the groups in (d)and indicate the F cutoff,the F you would use for the comparison,and the hypothesis-testing decision (reject or do not reject).
f.Explain the logic of what you did to a person who is familiar with the t test for independent means,but who knows nothing about the analysis of variance.(Be sure your explanation includes the logic of comparing within-groups to between-groups population variance estimates,the logic of how each of these is figured,the F distribution,and the F table.)
No-fault Insurance
An insurance policy where policyholders are compensated by their own insurance company, regardless of who is at fault in an accident.
Collision Deductible
A collision deductible is the amount of money a policyholder must pay out-of-pocket for vehicle repairs before their insurance coverage pays for the remaining costs in case of a collision.
Annual Premium
The total amount paid per year for an insurance policy to remain valid and provide coverage.
No-fault Insurance
An auto insurance policy where each party's insurance pays for their losses regardless of who was at fault in the accident.
Q1: If an analyst computes statistics from a
Q6: An organizational psychologist conducted a study to
Q8: In which of the following situations would
Q26: If there were 30 students in the
Q26: The t test can be derived from
Q28: In a t test for dependent means,15
Q33: If a study finds that the longer
Q35: A square-root transformation might be used to
Q54: To find the score in a t
Q58: Advanced topic: If there are four degrees