Independent samples t-test. An organicchemistry professor is testing whether popquizzes impact the overall performance ofher class. For the experiment, there are twogroups created: Group 1 (n = 21) is a sectionof students that will have pop quizzesthroughout the semester and Group 2 (n = 21)is a section of students that will not have anypop quizzes. The average final grade for thestudents in Group 1 was M = 88 with SS = 180and Group 2 was M = 82 with SS = 220. Canthe organic chemistry professor concludethat there is a significant difference betweenthe two groups? Test with a = 0.05.a. Conduct a complete hypothesis testb. Compute estimated r2c. Give a full APA-style write up of yourresults

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Description: Independent samples t-test. An organicchemistry professor is testing whether popquizzes impact the overall performance ofher class. For the experiment, there are twogroups created: Group 1 (n = 21) is a sectionof students that will have pop quizzest

Let the standard means of the two tests be equal for the groups taking pop quiz as well as for the…

Math

Statistics

Independent samples t-test. An organic chemistry professor is testing whether pop quizzes impact the overall performance of her class. For the experiment, there are two groups created: Group 1 (n = 21) is a section

Independent samples t-test. An organic chemistry professor is testing whether pop quizzes impact the overall performance of her class. For the experiment, there are two groups created: Group 1 (n = 21) is a section

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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Phosphorous is a chemical that is found in many household cleaning products. Unfortunately, phosphorous also finds its way into surface water, where it can harm fish, plants, and other wildlife. Two methods of phosphorous reduction are being studied. At a random sample of 7 locations, both methods were used and the total phosphorous reduction (mg/L) was recorded. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. Site 1 2 3 4 5 6 7 Method I: 0.013 0.020 0.015 0.055 0.007 0.002 0.010 Method II: 0.014 0.045 0.017 0.039 0.017 0.001 0.013 Do these data indicate a difference (either way) in the average reduction of phosphorous between the two methods? Use α = 0.05. (Let d = Method I − Method II.) (i) What is the level of significance? What is the value of the sample test statistic? (Round…
multiple choice
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p∗=22%p∗=22%. You would like to be 95% confident that your esimate is within 4% of the true population proportion. How large of sample size is required?