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vadiva vadiva
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Posts: 18
Rep: 4 0
9 years ago
2.    To study the effectiveness of treatments for insomnia, a sleep researcher conducted a study with 12 participants. Four participants were instructed to count sheep (Sheep Condition), four were told to concentrate on their breathing (Breathing Condition), and four were not given any special instructions. Over the next few days, measures were taken of how many minutes it took each participant to fall asleep. The average times for the participants in the Sheep Condition were 14, 28, 27, and 31; for those in the Breathing Condition, 25, 22, 17, and 14; and for those in the control condition, 45, 33, 30, and 41.
Do these results suggest that the different techniques have different effects?
(Use the .05 significance level.)
a.   Use the five steps of hypothesis testing.
b.   Sketch the distribution involved.
c.   Figure the effect size of the study.
d.   Explain your findings (including the logic of comparing within-group to between-group population variance estimates, how each of these is figured, and the F distribution).



3. High school juniors planning to attend college were randomly assigned to view one of four videos about a particular college, each differing according to what aspect of college life was emphasized: athletics, social life, scholarship, or artistic/cultural opportunities. After viewing the videos, the students took a test measuring their desire to attend this college. The results were as follows:

Desire to Attend this College
Athletics    Social Life      Scholarship      Art/Cultural
68         89         74            76
56         78         82            71
69         81         79            69
70         77         80            65

   Do these results suggest that the type of activity emphasized in a college film affects desire to attend that college? (Use the .01 significance level.)
a.   Use the five steps of hypothesis testing.
b.   Sketch the distribution involved.
c.   Figure the effect size of the study.
d.   Explain the logic of what you have done to a person who is unfamiliar with the analysis of
Post Merge: 9 years ago

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wrote...
Valued Member
Educator
9 years ago
2.    To study the effectiveness of treatments for insomnia, a sleep researcher conducted a study with 12 participants. Four participants were instructed to count sheep (Sheep Condition), four were told to concentrate on their breathing (Breathing Condition), and four were not given any special instructions. Over the next few days, measures were taken of how many minutes it took each participant to fall asleep. The average times for the participants in the Sheep Condition were 14, 28, 27, and 31; for those in the Breathing Condition, 25, 22, 17, and 14; and for those in the control condition, 45, 33, 30, and 41.
Do these results suggest that the different techniques have different effects?
(Use the .05 significance level.)
a.   Use the five steps of hypothesis testing.
b.   Sketch the distribution involved.
c.   Figure the effect size of the study.
d.   Explain your findings (including the logic of comparing within-group to between-group population variance estimates, how each of these is figured, and the F distribution).

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wrote...
9 years ago
Thank you so much for your help!
wrote...
Valued Member
Educator
9 years ago
You're welcome!
wrote...
9 years ago
Thank you so much!!
wrote...
9 years ago
Thanks, good example problem
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