Answered: It is known that the scores on a…

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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It is known that the scores on a standardized reading test are normally distributed with a mean of 65 and a standard deviation of 10. A researcher suspects that special training in reading skills will produce a change in the scores for the individuals in the population. A sample of 30 individuals is selected, and the treatment is given to this sample. Following treatment, the average score for this sample is 70. Draw a conclusion of the effect of training on scores using the steps of hypothesis testing.

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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