Researchers are interested in the effect of pet companionship on depression in elderly adults. They randomly select 25 participants from the target population and record th depression scores before and after spending a month with a dog (a higher score indicates a higher level of depression). The researchers then compute the difference score for each participant (difference after-before). The mean of differences is -1 and the standard deviation of differences is 2. Can the researchers conclude that there is an effect of pet companionship on depression in elderly adults? Conduct the appropriate statistical test (two-tailed) with a = .05. Which of the following values is the value of the test statistic in this analysis? O-2.50 -0.50 - 12.50
Researchers are interested in the effect of pet companionship on depression in elderly adults. They randomly select 25 participants from the target population and record th depression scores before and after spending a month with a dog (a higher score indicates a higher level of depression). The researchers then compute the difference score for each participant (difference after-before). The mean of differences is -1 and the standard deviation of differences is 2. Can the researchers conclude that there is an effect of pet companionship on depression in elderly adults? Conduct the appropriate statistical test (two-tailed) with a = .05. Which of the following values is the value of the test statistic in this analysis? O-2.50 -0.50 - 12.50
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Transcribed Image Text:Researchers are interested in the effect of pet companionship on depression in elderly adults. They randomly select 25 participants from the target population and record their
depression scores before and after spending a month with a dog (a higher score indicates a higher level of depression). The researchers then compute the difference scores
for each participant (difference = after before). The mean of differences is -1 and the standard deviation of differences is 2. Can the researchers conclude that there is an
effect of pet companionship on depression in elderly adults? Conduct the appropriate statistical test (two-tailed) with a = .05.
Which of the following values is the value of the test statistic in this analysis?
O - 2.50
Ⓒ -0.50
- 12.50
- 2.45
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