Answered: Out-of-State Tuitions The out-of-state…

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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Out-of-State Tuitions The out-of-state tuitions (in dollars) for random samples of both public and private four-year colleges in a New England state are listed. Find the 95% confidence interval for the difference in the means. Assume the variables are normally distributed and the variances are unequal. Round sample statistics and the final answers to two decimal places.

Private	Public
13,600	16,590	7050	6450
23,400	19,024	7050	9000
14,150	13,600	9758	7871
17,300	16,590	9113	16,100
		15,820	9000
Use u1 for the mean out-of-state tuition of private colleges. The 95confidence interval for the difference of the means is <u1-u2<

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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