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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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Question

In the 2014 NHANES survey, a trained health technician measured participants’ body weight in kilograms (kg). The findings indicated that the mean weight was 78kg with a standard deviation of 8.2 kg.

Find the probability that a randomly selected individual has a weight greater than 83 kg.
What is the relevance of studying biostatistics in public health?

3.Suppose that you are interested in estimating the mean total cholesterol of the population of obese persons in the Nairobi. Assume that the total cholesterol levels follow a normal distribution with unknown population mean (μ) but with known standard deviation σ = 39.7 mg/dL. A random sample of 353 obese patients is selected from the underlying population with mean total cholesterol of 189.9 mg/dL. Construct a 95% confidence interval for μ and interpret

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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