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Name: A researcher is evaluating the influence of a treatment using a sample
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Description: A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of μ = 40 and a standard deviation of σ = 12. The researcher expects a 6-point treatment effect and plans to use a two-

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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A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of μ = 40 and a standard deviation of σ = 12. The researcher expects a 6-point treatment effect and plans to use a two-tailed hypothesis test with α = .05.

Compute the power of the test if the researcher uses a sample of n = 9 individuals.

Compute the power of the test if the researcher uses a sample of n = 16 individuals.

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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