Answered: Gestational length, African American…

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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Gestational length, African American women, hypothesis test. Studies in the general population suggest that the gestational length of uncomplicated pregnancies varies according to a Normal distribution with μ = 39 weeks with σ = 2 weeks. A sample of 22 middle-class African American women demonstrates an average gestation length (Ẋ) of 38.5 weeks. Test whether the mean gestation period in the African American women is significantly different from the expected value of 39 weeks. Use a two-sided alternative hypothesis. Show all hypothesis testing steps.

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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