Answered: Heights of 1-year-old girls are…

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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Heights of 1-year-old girls are normally distributed, with mean 30 inches and standard deviation of 0.8 inches. A company claims that taking 500 mg of vitamin C makes girls taller. In a random sample of 89 baby girls who were given 500 mg vitamin C daily from birth to 1 year, the mean height was 30.2 inches. Calculate a 90% Confidence Interval for the heights of baby giris given vitamin C. Is there anything about this problem suggesting that the methods we learned should not be applied?

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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