A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 28 subjects had a mean wake time of 90.6min and a standard deviation of 40.2 minutes. Assume that the sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment is effective? 5. A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 28 subjectshad a mean wake time of 90.6 min and a standard deviation of 40.2 min. Assume that the 28 sample values appear to be from a normally distributedpopulation and construct a 90% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments.Does the result indicate whether the treatment is effective?Find the confidence interval estimate.| min

Sample size Sample mean Sample standard deviation

Answered: A clinical trial was conducted to test…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 28 subjects had a mean wake time of 90.6min and a standard deviation of 40.2 minutes. Assume that the sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment is effective?

5. A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the drug, 28 subjects
had a mean wake time of 90.6 min and a standard deviation of 40.2 min. Assume that the 28 sample values appear to be from a normally distributed
population and construct a 90% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments.
Does the result indicate whether the treatment is effective?
Find the confidence interval estimate.
| min<o<[
(Round to two decimal places as needed.)
Does the result indicate whether the treatment is effective?
min
O A. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 90.6 minutes.
O B. Yes, the confidence interval indicates that the treatment is effective because the interval does not contain 0 minutes.
O C. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 90.6 minutes.
O D. Yes, the confidence interval indicates that the treatment is not effective because the interval contains 0 minutes.
OE. Yes, the confidence interval indicates that the treatment is not effective because the interval does not contain 0 minutes.
OF. No, the confidence interval does not indicate whether the treatment is effective.
G. Yes, the confidence interval indicates that the treatment is effective because the interval contains 0 minutes.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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