Answered: Question 3 A. The management of White…

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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Question 3 A. The management of White Industries is considering a new method of assembling its golf cart. The present method requires a mean time of 42.3 minutes to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we conclude that the assembly time using the new method is faster? B. Do married and unmarried women spend the same amount of time per week using Facebook? A random sample of 45 married women who use Facebook spent an average of 3.0 hours per week on this social media website. A random sample of 39 unmarried women who regularly use Facebook spent an average of 3.4 hours per week. Assume that the weekly Facebook time for married women has a population standard deviation of 1.2 hours, and the population standard deviation for unmarried Facebook users is 1.1 hours per week. Using the .05 significance level, do married and unmarried women differ in the amount of time per week spent on Facebook? C. A ninth-grade teacher wishes to see if a new spelling program will reduce the spelling errors in his students’ writing. The number of spelling errors made by the students in a five-page assignment before the program is shown. Then the number of spelling errors made by students in a five-page assignment after the program is shown. Before 8 3 10 5 9 11 12 7 After 6 4 8 2 4 7 10 7 At 5% significance level, did the program work? Note: 1.please clear answer no Whois one A,B & C 2. No need excel formula

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