Researchers are studying the effect of smoking on the time it takes to fall asleep. A random sample of 50 smokers reported a mean time until sleep of 43.3 minutes with a standard deviation of 12.4 minutes. A random sample of 75 nonsmokers reported a mean time until sleep of 30.2 minutes with a standard deviation of 9.1 minutes. Construct a two-sided 95% confidence interval for the difference between the two means. Assume equal variances. 1. The value for t and how you found it 2. The calculation of the pooled variance (3. The calculation of the Standard Error, 4. The calculation of the Margin of Error, 5. The calculation of the upper and lower limits, and 6. An interpretation that includes whether the means differ
Researchers are studying the effect of smoking on the time it takes to fall asleep. A random sample of 50 smokers reported a mean time until sleep of 43.3 minutes with a standard deviation of 12.4 minutes. A random sample of 75 nonsmokers reported a mean time until sleep of 30.2 minutes with a standard deviation of 9.1 minutes. Construct a two-sided 95% confidence interval for the difference between the two means. Assume equal variances. 1. The value for t and how you found it 2. The calculation of the pooled variance (3. The calculation of the Standard Error, 4. The calculation of the Margin of Error, 5. The calculation of the upper and lower limits, and 6. An interpretation that includes whether the means differ
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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Researchers are studying the effect of smoking on the time it takes to fall asleep. A random sample of 50 smokers reported a mean time until sleep of 43.3 minutes with a standard deviation of 12.4 minutes. A random sample of 75 nonsmokers reported a mean time until sleep of 30.2 minutes with a standard deviation of 9.1 minutes. Construct a two-sided 95% confidence interval for the difference between the two means. Assume equal variances.
1. The value for t and how you found it 2. The calculation of the pooled variance (3. The calculation of the Standard Error, 4. The calculation of the Margin of Error, 5. The calculation of the upper and lower limits, and 6. An interpretation that includes whether the means differ
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