(b) What is the 95% confidence interval estimate of the population mean examination score if a sample of 100 applications provided a sample mean x = 833? A confidence interval for a population mean, u, is found by adding and subtracting the margin of error, E, to the given sample mean, as follows. Recall that z, is the standard normal random variable corresponding to a particular level of confidence and n is the sample size. x+ E, where E = z2 A sample of 100 applications provided a mean of 833 and the standard deviation is known to be 150. Thus, n = and . Now the value of za is needed. A 95% confidence interval is to be found. The margin of error corresponding to a 95% confidence level is needed, which is calculated using z2. Common values for z, for various confidence levels are given below. * Za/2 Confidence Level a 90% 0.10 0.05 1.645 95% 0.05 0.025 1.960 99% 0.01 0.005 2.576 For a 95% confidence level, the necessary value for z/2 is

(b) What is the 95% confidence interval estimate of the population mean examination score if a sample of 100 applications provided a sample mean x = 833? A confidence interval for a population mean, u, is found by adding and subtracting the margin of error, E, to the given sample mean, as follows. Recall that z, is the standard normal random variable corresponding to a particular level of confidence and n is the sample size. x+ E, where E = z2 A sample of 100 applications provided a mean of 833 and the standard deviation is known to be 150. Thus, n = and . Now the value of za is needed. A 95% confidence interval is to be found. The margin of error corresponding to a 95% confidence level is needed, which is calculated using z2. Common values for z, for various confidence levels are given below. * Za/2 Confidence Level a 90% 0.10 0.05 1.645 95% 0.05 0.025 1.960 99% 0.01 0.005 2.576 For a 95% confidence level, the necessary value for z/2 is

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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