Answered: A research conducted by SSTA022 Class…

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 research conducted by SSTA022 Class representative at the University of Limpopo indicates
that running increases the lifespan among African men. The mean lifespan of 31 African men
runners was 34.0% more than the mean lifespan of 31 inactive African men, with variances
reported to be 110.25% and 104.04%, respectively. Assuming the populations to be
approximately normally distributed with equal variances.
i) Can you conclude that there is a significant increase in the lifespan of the men runners over
the inactive men at ? = 0.05?
ii) Construct a 95% confidence interval for ?1 − ?2.

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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