Answered: A clinical trial was conducted to test…

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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Question

A clinical trial was conducted to test the effectiveness of a drug used for treating in older subjects. Before treatment with the drug 14 subjects had a mean wake time of 104.0 min.

After treatment the 14 subjects had smean wake time of 80.9 min and a standard deviation of 21.4 assume that the 14 sample value appear from a normally distributed population of construct a 90% confidence interval estimate of the mean wake time for a population with drug treatment.

What does the result suggest about the mean wake time of 104.0 before the treatment

Does the drug appear to be effective?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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