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d. Find P(x > 65).

d. Find P(x > 65).

MATLAB: An Introduction with Applications
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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Applying the Concepts-Basic 6.34 Corporate sustainability of CPA firms. Refer to the Business and Society (Mar. 2011) study on the sustainabil- ity behaviors of CPA corporations, Exercise 1.26 (p. 22). Recall that corporate sustainability refers to business practices designed around social and environmental con- siderations. The level of support senior managers have for corporate sustainability was measured quantitatively on a scale ranging from 0 to 160 points, where higher point val- ues indicate a higher level of support for sustainability. The study provided the following information on the distribu- tion of levels of support for sustainability: u = 68,0 = 27. Now consider a random sample of 30 senior managers and let i represent the sample mean level of support. a. Give the value of uz, the mean of the sampling distribu- tion of x, and interpret the result. b. Give the value of ox, the standard deviation of the sam- pling distribution of x, and interpret the result. c. What does the Central Limit Theorem say about the shape of the sampling distribution of x? d. Find P(x > 65). m е 6.35 Voltage sags and swells. Refer to the Electrical Engineering (Vol. 95, 2013) study of the power quality (sags and swells) of a transformer, Exercise 2.127 (p. 82). For transformers built for heavy industry, the distribution of the number of sags per week has a mean of 353 with a standard deviation of 30. Of interest is x, the sample mean number of sags per week for a random sample of 45 transformers. a. Find E(x) and interpret its value.
Transcribed Image Text:Applying the Concepts-Basic 6.34 Corporate sustainability of CPA firms. Refer to the Business and Society (Mar. 2011) study on the sustainabil- ity behaviors of CPA corporations, Exercise 1.26 (p. 22). Recall that corporate sustainability refers to business practices designed around social and environmental con- siderations. The level of support senior managers have for corporate sustainability was measured quantitatively on a scale ranging from 0 to 160 points, where higher point val- ues indicate a higher level of support for sustainability. The study provided the following information on the distribu- tion of levels of support for sustainability: u = 68,0 = 27. Now consider a random sample of 30 senior managers and let i represent the sample mean level of support. a. Give the value of uz, the mean of the sampling distribu- tion of x, and interpret the result. b. Give the value of ox, the standard deviation of the sam- pling distribution of x, and interpret the result. c. What does the Central Limit Theorem say about the shape of the sampling distribution of x? d. Find P(x > 65). m е 6.35 Voltage sags and swells. Refer to the Electrical Engineering (Vol. 95, 2013) study of the power quality (sags and swells) of a transformer, Exercise 2.127 (p. 82). For transformers built for heavy industry, the distribution of the number of sags per week has a mean of 353 with a standard deviation of 30. Of interest is x, the sample mean number of sags per week for a random sample of 45 transformers. a. Find E(x) and interpret its value.
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