Answered: he length of human pregnancies is…

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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The length of human pregnancies is approximately normally distributed with mean µ = 266 days and standard deviation σ = 16 days.

(a) What is the probability a randomly selected pregnancy lasts less than 260 days?

(b) What is the probability that a random sample of 50 pregnancies has a mean gestation period of 260 days or less?

(d) At least how many days should the longest 25% of all pregnancies last?

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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