Answered: The total energy needed during…

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 total energy needed during pregnancy is normally distributed, with a mean of 2600 kcal/day and a standard deviation of 50 kcal/day (Source: American Dietetic Association).

1)What is the probability that a random sample of 25 pregnant women has a mean energy need of more than 2620 kcal/day? Is this unusual? (round four decimal places)
2) What is the probability that a random sample of 25 pregnant women has a mean energy need between 2579 and 2610? (round four decimal places)

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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