The proper operation of typical home appliances requiresvoltage levels that do not vary much. Listed below are 11voltage levels (in volts) at a random house on 11 differentdays.120 119.9 119.9120 119.8120119.9120.1 120.5 119.9120.3The mean of the data set is 120; the sample standarddeviation is 0.21; if the normality plot is not provided youmay assume that the voltages are normally distributed. Usethe given sample standard deviation for your work.a. Construct a 90% confidence interval for the variance(standard deviation) of all voltages in the house.i. Procedure: Select an answerii. Assumptions: (select everything that applies)Sample size is greater than 30Population standard deviation is unknownSimple random sampleNormal populationPopulation standard deviation is knownThe number of positive and negativeresponses are both greater than 10iii. Unknown parameter: Select an answeriv. Point estimate: Select an answer î(Round the answer to 4 decimal places)v. Confidence level %→α =αand 12Critical values: right=left=(>||(Round the answer to 3 decimal places)vi. Margin of error (if applicable):answer to 4 decimal places)vii. Lower bound:viii. Upper bound:decimal places)ix. Confidence interval:(x.Interpretation: We are 0⁹% confident that theandtrue population parameter is betweenb. Based on the confidence interval, is it reasonable tobelieve that the population variance is less than 0.02?Explain.because Select an answer0.02."decimal places)(Round the(Round the answer to 4(Round the answer to 4

Given Information: Sample size n=11 Sample mean x¯=120 Sample standard deviation s=0.21 Required: To…

Answered: The proper operation of typical home…

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 company selling a new type of laptop battery advertises that it has a méan lifetime of 5 years. If you were in charge of quality control at the factory, which one of the following standard deviations of battery life spans would you prefer? 2 months. O 2 years O 5 years 27
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The life span of Duracell batteries is normally distributed. The mean life span is 10,502 hours an the standard deviation is 415 hours. If 66,500 duracell batteries are manufactured, approximately how many of those batteries last at least 9,850 hours? A 39,900 B. 46,600 C. 59,900 D. 62,600
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The proper operation of typical home appliances requires voltage levels that do not vary much. Listed below are 7 voltage levels (in volts) at a random house on 7 different days. 120.1 120.3 120.1 120.1 120 120.2 119.9 The mean of the data set is 120.1; the sample standard deviation is 0.129; if the normality plot is not provided you may assume that the voltages are normally distributed. Construct a 99% confidence interval for the variance (standard deviation) of all voltages in the house.
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