A researcher develops a new exercise regimen for influencing muscle strength. The researcher knows that scores on a well-validated measure of muscle strength are normally distributed with µ = 15 and σ = 4. The researcher administers their new exercise regimen to a sample of n = 64 adults who subsequently score M = 16.5 on the measure of muscle strength. Which conclusion can the researcher make based on the results of this research study? a.The new exercise regimen has an effect on muscle strength because the computed z-score reaches the z = ±1.96 threshold. b.The new exercise regimen has an effect on muscle strength because the computed z-score does not reach the z = ±1.96 threshold. c.The new exercise regimen does not have an effect on muscle strength because the computed z-score reaches the z = ±1.96 threshold. d.The new exercise regimen does not have an effect on muscle strength because the computed z-score does not reach the z = ±1.96 threshold.

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Description: A researcher develops a new exercise regimen for influencing muscle strength. The researcher knows that scores on a well-validated measure of muscle strength are normally distributed with µ = 15 and σ = 4. The researcher administers their new exercis

Denote μ as the population mean muscle strength. Null hypothesis: H0: μ = 15. Alternative…

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MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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A researcher develops a new exercise regimen for influencing muscle strength. The researcher knows that scores on a well-validated measure of muscle strength are normally distributed with µ = 15 and σ = 4. The researcher administers their new exercise regimen to a sample of n = 64 adults who subsequently score M = 16.5 on the measure of muscle strength. Which conclusion can the researcher make based on the results of this research study?

	a.	The new exercise regimen has an effect on muscle strength because the computed z-score reaches the z = ±1.96 threshold.
	b.	The new exercise regimen has an effect on muscle strength because the computed z-score does not reach the z = ±1.96 threshold.
	c.	The new exercise regimen does not have an effect on muscle strength because the computed z-score reaches the z = ±1.96 threshold.
	d.	The new exercise regimen does not have an effect on muscle strength because the computed z-score does not reach the z = ±1.96 threshold.

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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