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1. A researcher was interested in investigating the effectiveness of four different drugs and a placebo (sugar pill) on cholesterol levels. Twenty-five participants were randomly assigned to one of five conditions, where they received either a placebo (control) or one of the four cholesterol drugs. Two of the drugs had been on the market for several years (Drug A and Drug B), while the other two drugs were recently released (Drug C and Drug D). Conduct the appropriate test to assess whether there is an overall difference between the 5 drugs (that is, conduct the appropriate procedure that assesses, in a single test, whether there is a difference anywhere between the groups). (Testing exactly where the differences are for this problem is not required; what I want you to do is perform the appropriate overall test to assess if differences exist in general in the data). Higher scores indicate worse cholesterol. Drug A-old 163, 161, 153, 166, 174 Type of pill Drug B-old 145, 159, 171, 170, 168 Placebo 188, 179, 158, 173, 150 Drug C -new 116, 117, 132, 127, 134 Drug D-new 132, 142, 135, 156, 142 a. State the null and alternative hypotheses for the test below. b. Report the results of the hypothesis test in (a) below. Be sure to express the results in terms of the context of the study and use APA format as appropriate. (Post hoc tests are not required here - just the overall APA formatted results of the test of the null hypothesis provided in (a) above.). c What is the effect size for the study? Calculate and report the effect size below. Interpret the effect size according to Cohen's standards.

1. A researcher was interested in investigating the effectiveness of four different drugs and a placebo (sugar pill) on cholesterol levels. Twenty-five participants were randomly assigned to one of five conditions, where they received either a placebo (control) or one of the four cholesterol drugs. Two of the drugs had been on the market for several years (Drug A and Drug B), while the other two drugs were recently released (Drug C and Drug D). Conduct the appropriate test to assess whether there is an overall difference between the 5 drugs (that is, conduct the appropriate procedure that assesses, in a single test, whether there is a difference anywhere between the groups). (Testing exactly where the differences are for this problem is not required; what I want you to do is perform the appropriate overall test to assess if differences exist in general in the data). Higher scores indicate worse cholesterol. Drug A-old 163, 161, 153, 166, 174 Type of pill Drug B-old 145, 159, 171, 170, 168 Placebo 188, 179, 158, 173, 150 Drug C -new 116, 117, 132, 127, 134 Drug D-new 132, 142, 135, 156, 142 a. State the null and alternative hypotheses for the test below. b. Report the results of the hypothesis test in (a) below. Be sure to express the results in terms of the context of the study and use APA format as appropriate. (Post hoc tests are not required here - just the overall APA formatted results of the test of the null hypothesis provided in (a) above.). c What is the effect size for the study? Calculate and report the effect size below. Interpret the effect size according to Cohen's standards.

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 1EQ: 1. Suppose that, in Example 2.27, 400 units of food A, 600 units of B, and 600 units of C are placed...
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1. A researcher was interested in investigating the effectiveness of four different drugs and a placebo (sugar pill) on cholesterol levels. Twenty-five participants were randomly assigned to one of five conditions, where they received either a placebo (control) or one of the four cholesterol drugs. Two of the drugs had been on the market for several years (Drug A and Drug B), while the other two drugs were recently released (Drug C and Drug D). Conduct the appropriate test to assess whether there is an overall difference between the 5 drugs (that is, conduct the appropriate procedure that assesses, in a single test, whether there is a difference anywhere between the groups). (Testing exactly where the differences are for this problem is not required; what I want you to do is perform the appropriate overall test to assess if differences exist in general in the data). Higher scores indicate worse cholesterol. Drug A-old 163, 161, 153, 166, 174 Type of pill Drug B-old 145, 159, 171, 170, 168 Placebo 188, 179, 158, 173, 150 Drug C -new 116, 117, 132, 127, 134 Drug D-new 132, 142, 135, 156, 142 a. State the null and alternative hypotheses for the test below. b. Report the results of the hypothesis test in (a) below. Be sure to express the results in terms of the context of the study and use APA format as appropriate. (Post hoc tests are not required here - just the overall APA formatted results of the test of the null hypothesis provided in (a) above.). c What is the effect size for the study? Calculate and report the effect size below. Interpret the effect size according to Cohen's standards.
Transcribed Image Text:1. A researcher was interested in investigating the effectiveness of four different drugs and a placebo (sugar pill) on cholesterol levels. Twenty-five participants were randomly assigned to one of five conditions, where they received either a placebo (control) or one of the four cholesterol drugs. Two of the drugs had been on the market for several years (Drug A and Drug B), while the other two drugs were recently released (Drug C and Drug D). Conduct the appropriate test to assess whether there is an overall difference between the 5 drugs (that is, conduct the appropriate procedure that assesses, in a single test, whether there is a difference anywhere between the groups). (Testing exactly where the differences are for this problem is not required; what I want you to do is perform the appropriate overall test to assess if differences exist in general in the data). Higher scores indicate worse cholesterol. Drug A-old 163, 161, 153, 166, 174 Type of pill Drug B-old 145, 159, 171, 170, 168 Placebo 188, 179, 158, 173, 150 Drug C -new 116, 117, 132, 127, 134 Drug D-new 132, 142, 135, 156, 142 a. State the null and alternative hypotheses for the test below. b. Report the results of the hypothesis test in (a) below. Be sure to express the results in terms of the context of the study and use APA format as appropriate. (Post hoc tests are not required here - just the overall APA formatted results of the test of the null hypothesis provided in (a) above.). c What is the effect size for the study? Calculate and report the effect size below. Interpret the effect size according to Cohen's standards.
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