A clinical psychologist wants to test the effectiveness of three new therapies that have been developed for reducing anxiety symptoms. The researcher recruits 15 participants and randomly assigns them to take part in Therapy A, Therapy B, or Therapy C for a month. At the end of the month, the researcher measures the participants' anxiety symptoms on a scale from 1 to 10 (where a higher score means more anxiety symptoms). The participants' scores are shown below: What is the appropriate test to use ? 3. What are the null and alternative hypotheses ? 4. Using a two-tailed alpha of .05, determine what the critical value is
A clinical psychologist wants to test the effectiveness of three new therapies that have been developed for reducing anxiety symptoms. The researcher recruits 15 participants and randomly assigns them to take part in Therapy A, Therapy B, or Therapy C for a month. At the end of the month, the researcher measures the participants' anxiety symptoms on a scale from 1 to 10 (where a higher score means more anxiety symptoms). The participants' scores are shown below: What is the appropriate test to use ? 3. What are the null and alternative hypotheses ? 4. Using a two-tailed alpha of .05, determine what the critical value is
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 9CST
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Question
A clinical psychologist wants to test the effectiveness of three new therapies that have been developed for reducing anxiety symptoms. The researcher recruits 15 participants and randomly assigns them to take part in Therapy A, Therapy B, or Therapy C for a month. At the end of the month, the researcher measures the participants' anxiety symptoms on a scale from 1 to 10 (where a higher score means more anxiety symptoms). The participants' scores are shown below:
What is the appropriate test to use ?
3. What are the null and alternative hypotheses ?
4. Using a two-tailed alpha of .05, determine what the critical value is
5. Calculate the test statistic
6. State whether you reject or fail to reject the null hypothesis for the omnibus test
7. Calculate and report the effect size for the omnibus test
8. Perform a Post-Hoc Test. Report the significance of each pairwise comparison
Transcribed Image Text:Therapy A
2
4
3
3
3
MTherapyA = 3.00
MGrand= 5.00
Therapy B
6
5
5
7
2
MTherapyB = 5.00
Therapy C
9
7
6
6
7
= 7.00
MTherapyC=
Using the appropriate hypothesis test and the six steps of hypothesis testing, see
what the researcher should conclude about how the therapies compare in their
ability to reduce anxiety symptoms.
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