Education: Exams Professor Fair believes that extra time does not improvegrades on exams. He randomly divided a group of 300 students into twogroups and gave them all the same test. One group had exactly 1 hour inwhich to finish the test, and the other group could stay as long as desired. Theresults are shown in the following table. Test at the 0.01 level of significancethat time to complete a test and test results are independent.TimeARow Total1 h23426512142Unlimited1748858158Column409015020300Total

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Answered: Education: Exams Professor Fair…

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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Professor Fair believes that extra time does not improve grades on exams. He randomly divided a group of 300 students into two groups and gave them all the same test. One group had exactly 1 hour in which to finish the test, and the other group could stay as long as desired. The results are shown in the following table. Test at the 0.01 level of significance that time to complete a test and test results are independent. Time A B C F Row Total 1 h 20 43 58 11 132 Unlimited 19 48 84 17 168 Column Total 39 91 142 28 300 (i) Give the value of the level of significance.State the null and alternate hypotheses. H0: Time to take a test and test score are not independent.H1: Time to take a test and test score are independent. H0: The distributions for a timed test and an unlimited test are the same.H1: The distributions for a timed test and an unlimited test are different. H0: The distributions for a timed test and an unlimited test are different.H1: The distributions for a…
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The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher ㅏ 20 25 30 35 Salary (thousands of $) They are making more than 40 Submit Question H H 45 If a person is making the minimum salary for a construction worker, they are making more than what percentage of Teachers? % of Teachers. + 50 Q
Professor Fair believes that extra time does not improve grades on exams. He randomly divided a group of 300 students into two groups and gave them all the same test. One group had exactly 1 hour in which to finish the test, and the other group could stay as long as desired. The results are shown in the following table. Test at the 0.01 level of significance that time to complete a test and test results are independent. Time A B C F Row Total 1 h 22 41 65 12 140 Unlimited 17 49 86 8 160 Column Total 39 90 151 20 300 (ii) Find the sample test statistic. (Round your answer to two decimal places.)
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Save & E Suppose 40 percent of the customers at Pizza Palooza order a square pizza, 70 percent order a soft drink, and 28 percent order both a square pizza and a soft drink. Is ordering a soft drink independent of ordering a square pizza? O No O Yes
. Honesty Coffee stations in offices often just ask usersto leave money in a tray to pay for their coffee, butmany people cheat. Researchers at Newcastle Universityalternately taped two posters over the coffee station.During one week, it was a picture of flowers; during theother, it was a pair of staring eyes. They found that theaverage contribution was significantly higher when theeyes poster was up than when the flowers were there.Apparently, the mere feeling of being watched—even byeyes that were not real—was enough to encourage peopleto behave more honestly. [NY Times, Dec. 10, 2006]
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Canvas →XC Video Notes Lecture Notes Homework Textbook D Question 1 A professor was interested in comparing how well her students performed on their midterm and final exams in her calculus course. She randomly sampled 7 students from her class and recorded their midterm and final exam grades which are shown in the table below. Midterm and Final Exam Grade Comparisons Student X=Midterm Exam Y=Final Exam Student 1 75 76 Student 2 73 67 Student 3 87 93 Student 4 90 92 Student 5 72 66 Student 6 84 68 Student 7 91 88 Use this information to calculate Pearson's correlation coefficient. Make sure to type your answer as a decimal rounded to 3 decimal places. For example, if you thought the answer was 0.54321 then you would type in 0.543. Question 2 2 #3 80 F4 4 55 F5 6 MacBook Air & 7 A DI DD FB 2 pts 2 pts * 00 ( 8 9 0
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