Answered: The proper operation of typical home…

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

The proper operation of typical home appliances requires voltage levels that do not vary much. Listed below are 6 voltage levels (in volts) at a random house on 6 different days.

120	120	119.8	120	119.9
119.9

The mean of the data set is 119.9; the sample standard deviation is 0.08; if the normality plot is not provided you may assume that the voltages are normally distributed.

Construct a 95% confidence interval for the variance (standard deviation) of all voltages in the house.

Margin of error (if applicable): (Round the answer to 3 decimal places)
Lower bound: (Round the answer to 3 decimal places)
Upper bound: (Round the answer to 3 decimal places)

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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