Answered: Does the following boxplot show normal…

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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Does the following boxplot show normal distribution? A condiiton for a two sample T test is normal distribution, hence, was this condition met?

(0,9]
(14,19]
(19,25]
(9,14]
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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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Introduction -

Normal distribution - Normal distribution , also known as the Gaussian distribution , is a probability distribution that is symmetric about about the mean , showing that data near the mean are frequent in occurrence than data from the mean The graph of normal distribution will appear as a bell curve .

Box -plot - In descriptive statistics , a box plot or boxplot ( also known as box and whisker plot ) is a type of chart often used in explanatory data analysis .Box plots visually show the distribution of numerical data and skewness through dis[lying the data quartile or percentile and averages.