Answered: There is popular belief that herbal…

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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There is popular belief that herbal remedies such as Ginkgo Biloba and Ginseng may improve learning and memory in healthy adults. In a new study, a researcher obtains a sample of n = 36 participants and has each person take the herbal supplements every day for 90 days. The researcher wants to assess whether memory scores will increase for those taking the herbal remedies. At the end of 90 days, each person takes a standardized memory test. For the general population, scores from the test are normally distributed with a mean of μ = 80 and a standard deviation of σx = 18. The sample of research participants had an average of 84.

a. Identify the independent variable.

b. Identify the dependent variabl

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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