Answered: a researcher has a new treatment for…

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 has a new treatment for anxiety. the researcher knows that anxiety scores are normally distributed with u = 65 and o = 12. the researcher administers their new treatment to a sample of individual and subsequently measures anxiety levels. (a) if the sample size was n = 20 and M = 60 after treatment, can the researcher conclude the new treatment has an effect? justify your response (b) if the sample size was n = 200 and m = 63 after treatment can the researcher conclude the new treatment has an effect? justify your response.

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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