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Name: . Travelers pay taxes for flying, car rentals, and hotels. The followi
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Description: . Travelers pay taxes for flying, car rentals, and hotels. The following data represent the total travel tax for a 3-day business trip in eight randomly selected cities. The data have already been verified to be normally distributed and that the stan

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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. Travelers pay taxes for flying, car rentals, and hotels. The following data represent the total travel tax for a 3-day business trip in eight randomly selected cities. The data have already been verified to be normally distributed and that the standard deviation, s, is 12.324 dollars. Construct and interpret a 90% confidence interval for the standard deviation travel tax for a 3-day business trip by answering the following:
2A) Find the variance.
2B) Describe what you are looking up on Table VIII to find X ( α 2 ) 2 and X ( 1 − α 2 ) 2
2C) Find the lower & upper bound.
2D) Describe what this information means that you have found for this problem, as in, interpret the information.

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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