(b)Sample size:Point estimate:0Population standard deviation:0Critical value:0Compute0.000.002.00Standard error:Margin of error:95% confidence interval:4.0095% confidence interval:XBased on your sample, enter the lower and upper limits to graph the 95% confidence interval for the population mean of the battery lifetimes for allphones of the manufacturer's latest model.6.00Confidencelevel99%95%90%Critical value8.00-0.005 = 2.576-0.025 = 1.960-0.050 = 1.64510.0010.00 A cell phone manufacturer has hired you to estimate the population mean of the battery lifetimes for all phones of their latest model. You decide to measurebattery lifetime by recording the time it takes for the battery charge to run out while a tester is streaming videos on the phones continuously. Then you select arandom sample of 45 cell phones of the manufacturer's latest model and record their battery lifetimes. Assume that the population standard deviation of thebattery lifetimes for that cell phone model (using your method of measurement) is 2.42 hours.Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the battery lifetimes for all phones of themanufacturer's latest model. (If necessary, consult a list of formulas.)(a) Click on "Take Sample" to see the results from your random sample of 45 phones of the manufacturer's latest model.Take SampleSample size:Number of phonesPoint estimate:45Sample meanStandard error:5.49Sample standardxdeviation2.15Enter the values of the sample size, the point estimate for the population mean, the population standard deviation, and the critical value you needfor your 95% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute".Population standarddeviation2.42AooA BI.▷

It is given that the information of one sample for calculating the confidence interval for normal…

Answered: (b) Based on your sample, enter the…

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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A random sample of 130130 observations produced a mean of ?⎯⎯⎯=30.2x¯=30.2 from a population with a normal distribution and a standard deviation ?=4.49σ=4.49. (c) Find a 9090% confidence interval for ?μ
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(b) Based on your sample, enter the lower and upper limits to graph the 95% confidence interval for the population mean of the battery lifetimes for al phones of the manufacturer's latest model. 0.00 0.00 2.00 95% confidence interval: 4.00 6.00 8.00 10.00 10.00