Answered: When 14 different second-year medical…

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

When

different second-year medical students measured the systolic blood pressure of the same person, they obtained the results listed below (in mmHg). Assuming that the population standard deviation is known to be

mmHg, use a

0.05

significance level to test the claim that the mean blood pressure level is less than

140

mmHg. Hypertension is defined to be a blood pressure level that is too high because it is

140

mmHg or greater. Assume the blood pressure levels are normally distributed. Based on the hypothesis test results, can it be safely concluded that the person does not have hypertension?

138

140

135

120

125

120

140

130

144

143

130

120

150

a) Identify the null hypothesis and alternative hypothesis.

b) Identify the P-value.

c) What is the final conclusion?

Fail to reject H0. There

is not sufficient evidence to support the claim.

Reject H0. There is not sufficient evidence to support the claim.

C. Reject H0. There is sufficient evidence to support the claim.

D. Fail to reject H0. There is sufficient evidence to support the claim.

d) Can it be safely concluded that the person does not have hypertension?

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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