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10.62 Effect of scopolamine on memory. The drug scopolamine Dis often used as a sedative to induce sleep in patients. In SCOPOL Behavioral Neuroscience (Feb. 2004), medical researchers examined scopolamine's effects on memory with associ- ated word pairs. A total of 28 human subjects, were given a list of related word pairs to memorize. For every word pair in the list (e.g., robber-jail), there was an associated word pair with the same first word, but a different second word (e.g., robber-police). The subjects were then randomly divided into three treatment groups. Group 1 subjects were administered an injection of scopolamine, group 2 subjects were given an injection of glycopyrrolate (an ac- tive placebo), and group 3 subjects were not given any drug. Four hours later, subjects were shown 12 word pairs from the list and tested on how many they could recall. The data on number of pairs recalled (simulated on the basis of summary information provided in the research article) are listed below. Prior to the analysis, the researchers the- orized that the mean number of word pairs recalled for the scopolamine subjects (group 1) would be less than the cor- responding means for the other two groups. Group 1 (Scopolamine): 5 8 8 666 686456 Group 2 (Placebo): Group 3 (No drug): 8 10 12 10 9 7 9 10 8 9 11 12 11 10 12 12 a. Explain why this is a completely randomized design. b. Identify the treatments and response variable. c. Find the sample means for the three groups. Is this suf- ficient information to support the researchers' theory? Explain. d. Conduct an ANOVA F-test on the data. Is there suffi- cient evidence (at a = .05) to conclude that the mean number of word pairs recalled differs among the three treatment groups? e. Conduct multiple comparisons of the three means (using an experimentwise error rate of .05). Do the re- sults support the researchers' theory? Explain.

10.62 Effect of scopolamine on memory. The drug scopolamine Dis often used as a sedative to induce sleep in patients. In SCOPOL Behavioral Neuroscience (Feb. 2004), medical researchers examined scopolamine's effects on memory with associ- ated word pairs. A total of 28 human subjects, were given a list of related word pairs to memorize. For every word pair in the list (e.g., robber-jail), there was an associated word pair with the same first word, but a different second word (e.g., robber-police). The subjects were then randomly divided into three treatment groups. Group 1 subjects were administered an injection of scopolamine, group 2 subjects were given an injection of glycopyrrolate (an ac- tive placebo), and group 3 subjects were not given any drug. Four hours later, subjects were shown 12 word pairs from the list and tested on how many they could recall. The data on number of pairs recalled (simulated on the basis of summary information provided in the research article) are listed below. Prior to the analysis, the researchers the- orized that the mean number of word pairs recalled for the scopolamine subjects (group 1) would be less than the cor- responding means for the other two groups. Group 1 (Scopolamine): 5 8 8 666 686456 Group 2 (Placebo): Group 3 (No drug): 8 10 12 10 9 7 9 10 8 9 11 12 11 10 12 12 a. Explain why this is a completely randomized design. b. Identify the treatments and response variable. c. Find the sample means for the three groups. Is this suf- ficient information to support the researchers' theory? Explain. d. Conduct an ANOVA F-test on the data. Is there suffi- cient evidence (at a = .05) to conclude that the mean number of word pairs recalled differs among the three treatment groups? e. Conduct multiple comparisons of the three means (using an experimentwise error rate of .05). Do the re- sults support the researchers' theory? Explain.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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10.62 Effect of scopolamine on memory. The drug scopolamine Dis often used as a sedative to induce sleep in patients. In SCOPOL Behavioral Neuroscience (Feb. 2004), medical researchers examined scopolamine's effects on memory with associ- ated word pairs. A total of 28 human subjects, were given a list of related word pairs to memorize. For every word pair in the list (e.g., robber-jail), there was an associated word pair with the same first word, but a different second word (e.g., robber-police). The subjects were then randomly divided into three treatment groups. Group 1 subjects were administered an injection of scopolamine, group 2 subjects were given an injection of glycopyrrolate (an ac- tive placebo), and group 3 subjects were not given any drug. Four hours later, subjects were shown 12 word pairs from the list and tested on how many they could recall. The data on number of pairs recalled (simulated on the basis of summary information provided in the research article) are listed below. Prior to the analysis, the researchers the- orized that the mean number of word pairs recalled for the scopolamine subjects (group 1) would be less than the cor- responding means for the other two groups. Group 1 (Scopolamine): 5 8 8 666 686456 Group 2 (Placebo): Group 3 (No drug): 8 10 12 10 9 7 9 10 8 9 11 12 11 10 12 12 a. Explain why this is a completely randomized design. b. Identify the treatments and response variable. c. Find the sample means for the three groups. Is this suf- ficient information to support the researchers' theory? Explain. d. Conduct an ANOVA F-test on the data. Is there suffi- cient evidence (at a = .05) to conclude that the mean number of word pairs recalled differs among the three treatment groups? e. Conduct multiple comparisons of the three means (using an experimentwise error rate of .05). Do the re- sults support the researchers' theory? Explain.
Transcribed Image Text:10.62 Effect of scopolamine on memory. The drug scopolamine Dis often used as a sedative to induce sleep in patients. In SCOPOL Behavioral Neuroscience (Feb. 2004), medical researchers examined scopolamine's effects on memory with associ- ated word pairs. A total of 28 human subjects, were given a list of related word pairs to memorize. For every word pair in the list (e.g., robber-jail), there was an associated word pair with the same first word, but a different second word (e.g., robber-police). The subjects were then randomly divided into three treatment groups. Group 1 subjects were administered an injection of scopolamine, group 2 subjects were given an injection of glycopyrrolate (an ac- tive placebo), and group 3 subjects were not given any drug. Four hours later, subjects were shown 12 word pairs from the list and tested on how many they could recall. The data on number of pairs recalled (simulated on the basis of summary information provided in the research article) are listed below. Prior to the analysis, the researchers the- orized that the mean number of word pairs recalled for the scopolamine subjects (group 1) would be less than the cor- responding means for the other two groups. Group 1 (Scopolamine): 5 8 8 666 686456 Group 2 (Placebo): Group 3 (No drug): 8 10 12 10 9 7 9 10 8 9 11 12 11 10 12 12 a. Explain why this is a completely randomized design. b. Identify the treatments and response variable. c. Find the sample means for the three groups. Is this suf- ficient information to support the researchers' theory? Explain. d. Conduct an ANOVA F-test on the data. Is there suffi- cient evidence (at a = .05) to conclude that the mean number of word pairs recalled differs among the three treatment groups? e. Conduct multiple comparisons of the three means (using an experimentwise error rate of .05). Do the re- sults support the researchers' theory? Explain.
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