Answered: The manager of a fleet of automobiles…

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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Transcribed Image Text:The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the two rear wheels of eight cars and runs the cars until the tires wear out. The data (in kilometers) follow. Find a 99% confidence interval on the difference in the mean life. Car Brand 1 Brand 2 36,925 34,318 2 45,300 42.280 3. 36.263 35,481 4 32,100 31,950 37.210 38,015 48,360 47,800 38,200 37,810 33.500 33,215 Round your answer to 2 decimal places. Do not use commas. I727.73 SPD S i 246448 Does the confidence interval constructed in the previous step indicate that one brand is better than the other? No difference in the brands can be concluded since O is contained in the interval A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers, familiar with both languages, are asked to code a standard function in both languages, and the time (in minutes) is recorded. The data follow: Time Programmer Design Language 1 Design Language 2 17 18 17 14 3. 21 18 4 13 11 5 18 24 6. 24 21 15 10 8. 14 13 21 19 10 23 24 11 13 15 10 23 24 11 13 15 12 18 20 (a) Is the assumption that the difference in coding time is normally distributed reasonable? Yes. (b) Find a 95% confidence interval on the difference in mean coding times. Is there significant indication that one design language is preferable at a 5% significance level? No. -2277 SHD S i 0.943 Round your answer to 3 decimal places (eg. 98.765). Statistical Tables and Charts

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