A researcher hopes to demonstrate that her Interpersonal Psychotherapy (IPT) is more effective than Cognitive Behavior Therapy (CBT) in reducing Beck Depression Inventory (BDI) scores. She predicts that the IPT group will have lower scores than the CBT. She randomly assigns 25 depressed patients to each treatment and her results are summarized below. Use alpha = .05 for the following questions. СВТ IPT X = 26 X = 21 S1 = 4 S2 = 3 ni= 25 n2 = 25

A researcher hopes to demonstrate that her Interpersonal Psychotherapy (IPT) is more effective than Cognitive Behavior Therapy (CBT) in reducing Beck Depression Inventory (BDI) scores. She predicts that the IPT group will have lower scores than the CBT. She randomly assigns 25 depressed patients to each treatment and her results are summarized below. Use alpha = .05 for the following questions. СВТ IPT X = 26 X = 21 S1 = 4 S2 = 3 ni= 25 n2 = 25

Name: 1. A researcher hopes to demonstrate that her Interpersonal Psychothe
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Description: 1. A researcher hopes to demonstrate that her Interpersonal Psychotherapy (IPT) is more effective thanCognitive Behavior Therapy (CBT) in reducing Beck Depression Inventory (BDI) scores. She predictsthat the IPT group will have lower scores than the

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 11PPS

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A researcher conducts an independent-measures study examining how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats receives a drug that lowers brain levels of serotonin. Then the researcher tests the animals by recording the number of aggressive responses each of the rats display. The data are as follows. Control Low Serotonin n = 10 n = 15 M = 14 M = 19 SS = 180.5 SS = 130.0 A. Does the drug have a significant effect on aggression?Use an alpha level of .05, two tails. H0 = ________________________________________ df = _________________________________________ tcritical =…
A researcher conducts an independent-measures study examining how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats receives a drug that lowers brain levels of serotonin. Then the researcher tests the animals by recording the number of aggressive responses each of the rats display. The data are as follows. Control Low Serotonin n = 15 n = 20 M = 18 M = 22 SS = 172.5 SS = 135.0 a. What research design was used to answer this question? b. What was the scale of measurement for the dependent variable? c. What was the scale of measurement for the independent variable? d. Does the drug have a significant effect on aggression? Use an alpha level of .05, two tails. e. Compute r2 and write an…
A researcher conducts an independent-measures study to examine how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats, low serotonin group, receives a drug that lowers brain levels of serotonin. Then, the researcher tests the animals by recording the number of aggressive responses each of the rats display. See the data below. Is there a significant difference between the control group and the low serotonin group regarding the number of aggressive responses?                                                Control         Low Serotonin                                                    n = 10                 n = 15                                                M = 14               M = 19                                                SS = 180.5       SS = 130 Perform a hypothesis test using independent-measures t-test. Use a two-tailed…
A researcher conducts an independent-measures study to examine how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats, low serotonin group, receives a drug that lowers brain levels of serotonin. Then, the researcher tests the animals by recording the number of aggressive responses each of the rats display. See the data below. Is there a significant difference between the control group and the low serotonin group regarding the number of aggressive responses?                                                Control         Low Serotonin                                                    n = 10                 n = 15                                                M = 14               M = 19                                                SS = 180.5       SS = 130 Perform a hypothesis test using independent-measures t-test. Use a two-tailed…
A researcher conducts an independent-measures study to examine how the brain chemical serotonin is related to aggression. One sample of rats serves as a control group and receives a placebo that does not affect normal levels of serotonin. A second sample of rats, low serotonin group, receives a drug that lowers brain levels of serotonin. Then, the researcher tests the animals by recording the number of aggressive responses each of the rats display. See the data below. Is there a significant difference between the control group and the low serotonin group regarding the number of aggressive responses?                                                Control         Low Serotonin                                                    n = 10                 n = 15                                                M = 14               M = 19                                                SS = 180.5       SS = 130 Perform a hypothesis test using independent-measures t-test. Use a two-tailed…
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