Answers:1. Fobt = 7.54, reject H0;, do Wilcoxon; Tobt = 90.5, reject H02. Fobt = 10.08, reject H0, do Wilcoxon; Zobt = 1.197, do not reject H03. t = .163, Do not reject H0; no evidence that the device increases cars'mpg 12.3.Sixteen subjects were randomly assigned to one of two groups in an experiment investigating theeffect of stress on test-taking performance. Subjects in group 1 completed a 100-item test with notime limit, while subjects in group 2 were allowed only 30 seconds to complete each item on thesame test. The following data were obtained:Group 11.2.yielding the following data.Answers:568 AUSWNTO867278there any significant difference between the performance of the two groups? (a <.05)The same experiment was now repeated with a sample of 25 subjects. Again, group 1 did the testwith no time limit and group 2 was timed, yielding the following data:Group 1Group 21074837228204472011113494872848176817441X-bar, - 77.5X-bar₂ = 61.875$5.35$14.697983837281808380n₁ = 12X-barl= 79.5Si= 4.123Group 272576572864854Did subjects in group 2 score lower, on average, than subjects in group 1? (a<.01)A new pollution control device for automobiles is claimed not only toreduce carbon monoxide emission but also to increase a car's miles pergallon. To test the latter claim, the mileage per gallon of 10 randomlyselected cars is measured first without and then with the device,32213610201493214468558Miles per gallonCar Without Device With Device76835692817260648855n₂-13X-bar; -71.85$213.088Does the device significantly increase cars' mileage per gallon (a<.05)?Fob 7.54, reject Ho;, do Wilcoxon; Tobe - 90.5, reject HoFabt 10.08, reject Ho do Wilcoxon; Zote1.197, do not reject Hot = .163, Do not reject Ho; no evidence that the device increases cars'3.mpg

To achieve the goal of treating the project as a data storytelling project and make a case to double…

A group of school districts meet with your data analysis team to help make a case to double the funds being made available for modernizing each school district's software. Your manager recommends that your team treat this as a data storytelling project. Which of the following should be key next steps to achieve this goal? Select all that apply. Find a suitable data set about similar software upgrades in schools around the country. Pick a question to answer or angle to explore using the data set. Clean up the data by unifying all data sets. Explore the data set thoroughly to find interesting relationships

A group of school districts meet with your data analysis team to help make a case to double the funds being made available for modernizing each school district's software. Your manager recommends that your team treat this as a data storytelling project. Which of the following should be key next steps to achieve this goal? Select all that apply. Find a suitable data set about similar software upgrades in schools around the country. Pick a question to answer or angle to explore using the data set. Clean up the data by unifying all data sets. Explore the data set thoroughly to find interesting relationships

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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