**Sample Data for Population Mean Estimation**Use the following sample to estimate a population mean, denoted as \( \mu \).Sample Data:- -0.4- 41.3- -2.6- 7.6- 33.5- 22.7- 33.1- 47.1- 13.8- -8.6- 36.8**Task:**Assuming the population is normally distributed, calculate the 90% confidence interval for the population mean. Your answer should be in the form of an open interval (i.e., parentheses) and accurate to two decimal places.90% C.I. = \( \_\_\_\_\_\_ \)

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Answered: Use the following sample to estimate a…

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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Use the following sample to estimate a population mean μ. 68 55.5 62.9 65 36.6 66.3 Assuming the population is normally distributed, find the 80% confidence interval about the population mean. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places.80% C.I. =
2.5 A confidence interval estimate is constructed around a. the degree of confidence b. the population parameter C. the population mean d. the point estimate 2.6 The z value that is used to construct a 95% confidence interval is: a. 2,58 b. 1.65 C. 1.96 d. 1.28 2.7 Which of the following is NOT a property of the student'st distribution? a. It's exact shape (i.e., spread) is characterized by the degrees of freedom b. It is symmetric c. All of the above are properties of the t distribution d. As the sample size grows, it gradually approaches the normal distribution
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you measure the weights of a random sample of twenty-five people. The sample mean is 60 kg. Suppose that the mean weights of people follow a normal distribution with an unknown mean and standard deviation of 5 kg. You compute a 95% confidence interval for μ. The 95% confidence interval for μ is?
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Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the SE mean for the sales from china? Calculate a 95% confidence interval for the mean sales amount made in America. Use the statistical tables when necessary and show all workings

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