Answered: At α= 0.05, can you conclude that this…

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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Hypothesis Testing :

An auto maker estimates that the mean gas mileage of its sports utility vehicle is 20 miles per gallon. A random sample of 8 such vehicles had a mean of 18 miles per gallon and a standard deviation of s= 5 miles per gallon. At α= 0.05, can you conclude that this kind of vehicle has gas mileage less than 20 miles per gallon? Assume the populationis normally distributed.

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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