Answered: A researcher is interested in studying…

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

A researcher is interested in studying a collected sample of data. However, before continuing, they realize that they need to determine whether the data is normally distributed. Test the data for the researcher and tell them whether their data tests normally distributed or not. Use a significance level of 0.05 on the data listed below:

SAMPLE

201

213

245

227

222

225

183

222

211

241

235

224

209

223

228

247

241

230

215

210

Besides the statistical testing outcome, is there any other evidence to suggest that the data is or is not normally distributed?

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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