A psychologist uses a treatment method called Cognitive Behavioral Therapy (CBT) to help reduce stress iiamong college students. She offered weekly therapy sessions to 30 college students and measured the stresslevel of each student before the first therapy session and again after the last therapy session. She wants to'estimate the amount of stress reduction after students receive the CBT treatment. Students' average stresSIScore changed from M = 35 before the first therapy session to M2 = 29.5 after the last therapy session. Theįdata produced a mean difference of Mp = 5.5 and a sum of square of SSp = 426.3 for the difference scores'between the two measurements.1a. Use the sample data to make a point estimate of the mean difference in stress scores between the twomeasurements (i.e., before the first therapy session and after the last therapy session) in the population.'b. Make an interval estimate of the mean difference so that you are 90% confident that the population meanIdifference is in your interval.

given μd = 35 Sample mean: Md = 8.2 Sample standard deviation: sd = 426.3^0.5 = 20.65 n = 30…

12. A psychologist uses a treatment method called Cognitive Behavioral Therapy (CBT) to help reduce stress iamong college students. She offered weekly therapy sessions to 30 college students and measured the stress level of each student before the first therapy session and again after the last therapy session. She wants to estimate the amount of stress reduction after students receive the CBT treatment. Students' average stress Iscore changed from Mị = 35 before the first therapy session to M; = 29.5 after the last therapy session. The data produced a mean difference of Mp = 5.5 and a sum of square of SSp = 426.3 for the difference scores between the two measurements. %3D ia. Use the sample data to make a point estimate of the mean difference in stress scores between the two measurements (i.e., before the first therapy session and after the last therapy session) in the population. 'b. Make an interval estimate of the mean difference so that you are 90% confident that the population mean Idifference is in your interval.

12. A psychologist uses a treatment method called Cognitive Behavioral Therapy (CBT) to help reduce stress iamong college students. She offered weekly therapy sessions to 30 college students and measured the stress level of each student before the first therapy session and again after the last therapy session. She wants to estimate the amount of stress reduction after students receive the CBT treatment. Students' average stress Iscore changed from Mị = 35 before the first therapy session to M; = 29.5 after the last therapy session. The data produced a mean difference of Mp = 5.5 and a sum of square of SSp = 426.3 for the difference scores between the two measurements. %3D ia. Use the sample data to make a point estimate of the mean difference in stress scores between the two measurements (i.e., before the first therapy session and after the last therapy session) in the population. 'b. Make an interval estimate of the mean difference so that you are 90% confident that the population mean Idifference is in your interval.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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