47 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 26.7 pounds. Assume that o =3.5 pounds.What is the 95% confidence interval for the true mean weight, u, of all packages received by the parcel service?025.3 to 28.1 poundsO 25.9 to 27.5 poundsO 25.8 to 27.6 poundsO 25.7 to 27.7 pounds

We want to find 95% CI for population mean μ

Answered: 47 packages are randomly selected from…

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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The annual earnings of 14 randomly selected computer software engineers have a sample standard deviation of $3621. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance o² and the population standard deviation 6. Use a 99% level of confidence. Interpret the results. What is the confidence interval for the population variance o²?
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