Answered: Two new drugs were given to patients…

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

Two new drugs were given to patients with heart disease . The first drug lowered the
blood pressure of sixteen patients an average of 11 points, with a standard deviation
of 6 points. The second drug lowered the blood pressure of fourteen other patients an
average of 12 points , with a standard deviation of 8 points. Determine a 98% confidence interval for the difference in the mean reductions in blood pressure, assuming
that the measurements are normally distributed with equal variances. Explain if either
of these drugs is more effective at reducing blood pressure.

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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