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Name: A random sample of 1818 American students had a mean height of 7070 in
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Description: A random sample of 1818 American students had a mean height of 7070 inches with a standard deviation of 3.033.03 inches. A random sample of 1212 non-American students had a mean height of 66.166.1 inches with a standard deviation of 2.352.35 inches.

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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A random sample of 1818 American students had a mean height of 7070 inches with a standard deviation of 3.033.03 inches. A random sample of 1212 non-American students had a mean height of 66.166.1 inches with a standard deviation of 2.352.35 inches. Determine the 99% confidence interval for the true mean difference between the mean height of the American students and the mean height of the non-American students. Assume that the population variances are equal and that the two populations are 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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