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A researcher intends to estimate the effect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a random sample of 9 subjects were given the drug prior to testing. The mean score in this group was 9.23, and the sample variance was 17.04. An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.93, and the sample variance was 27.44. Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores. The confidence interval is

A researcher intends to estimate the effect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a random sample of 9 subjects were given the drug prior to testing. The mean score in this group was 9.23, and the sample variance was 17.04. An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.93, and the sample variance was 27.44. Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores. The confidence interval is

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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 intends to estimate the effect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a random sample of 9 subjects were given the drug prior to testing. The mean score in this group was 9.23, and the sample variance was 17.04. An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.93, and the sample variance was 27.44. Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores. The confidence interval is <Hx-Hy < (Round to two decimal places as needed.)
Transcribed Image Text:A researcher intends to estimate the effect of a drug on the scores of human subjects performing a task of psychomotor coordination. The members of a random sample of 9 subjects were given the drug prior to testing. The mean score in this group was 9.23, and the sample variance was 17.04. An independent random sample of 10 subjects was used as a control group and given a placebo prior to testing. The mean score in this control group was 15.93, and the sample variance was 27.44. Assuming that the population distributions are normal with equal variances, find a 90% confidence interval for the difference between the population mean scores. The confidence interval is <Hx-Hy < (Round to two decimal places as needed.)
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