Answered: Data is collected from a random sample…

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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Experiment 1:

Data is collected from a random sample of 16 third grade children reading without and then with a dog, to see if reading to a dog improves the average reading speed (ie. reading with dog had more wpm). It can be assumed that the reading speeds of the third graders are normally distributed.

Let = WPM without dog and = WPM with dog.

What is the null and alternative hypothesis? Is the sample independent or dependent?

H₀:

Ha:

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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