According to one study among a certain people group, pregnancy lengths are approximately normally distributed with a mean of 267 days and a standard deviation of 7 days. Approximately 12.7% of babies are premature, which means that they are born before 37 weeks in the pregnancy. A random sample of 75 pregnant women from this people group is observed and the length of each pregnancy is tracked. Let X be the number of premature babies born to these mothers.Choose one: X is a discrete random variable. X is a continuous random variable.

Let X be the number of premature babies born to these mothers.

Answered: According to one study among a certain…

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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According to one study among a certain people group, pregnancy lengths are approximately normally distributed with a mean of 267 days and a standard deviation of 7 days. Approximately 12.7% of babies are premature, which means that they are born before 37 weeks in the pregnancy. A random sample of 75 pregnant women from this people group is observed and the length of each pregnancy is tracked. Let X be the number of premature babies born to these mothers.

Choose one:

X is a discrete random variable.

X is a continuous random variable.

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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