Answered: From a senior citizen home of 1000…

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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From a senior citizen home of 1000 elders it is found that their usage of smartphone follows a normal distribution with the mean equal 300 minutes and standard deviation equal 90 minutes. ABC tests from the master population (MP) a sample (S1) of 80 elderly and confirms that 40 elders from the sample (S1) use smartphone. Determine at 99% confidence level, the master population (MP) proportion that use the smartphone.

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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