A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15people and obtains the results below. From past studies, the publisher assumes σ is 1.8 minutes and that the population of times is normally distributed.8712119 6 81010109107128Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals.The 90% confidence interval is (☐☐ ). (Round to one decimal place as needed.)The 99% confidence interval is (☐☐). (Round to one decimal place as needed.)Which interval is wider?○ The 99% confidence interval○ The 90% confidence interval

Given,Sample size, n = 15Population standard deviation, σ = 1.8Sample data are,12, 8, 7, 11, 9, 6,…

Answered: A publisher wants to estimate the mean…

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 following sample data are from a normal population: 10,9,12,14,13,11,6,5 c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)? d.
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 65 dates, the mean record high daily temperature in a certain city has a mean of 84.70°F. Assume the population standard deviation is 14.54°F.
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A sample of 16 data points is collected from a larger population. 3 2 7 6 4 4 8 4 5 7 4 5 3 5 8 6 Find the mode of the above data Find the median of the above data set Use the data to estimate the standard deviation This is a three-part question, if you can do all parts that would be awesome!
A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 149 students who averaged 34.2 texts per day. The standard deviation was 18.6 texts. Round to 3 decimals. b. With 90% confidence the population mean number of texts per day is between _______ and ________ texts a day.
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