A set of data was published in the fall 2019 Phi Kappa Phi Forum regarding the performance ofMajor League Baseball (MLB) umpires in calling balls and strikes. The article is based on datacollected by MLB over eleven seasons (2008-2018). This study shows that it is common for umpiresto make incorrect calls more than 20% of the time. An average game has about 300 pitches wherethe umpire has to make a decision. Assume that we take a random sample of 300 of the 4 millionball/strike calls in the database.Our analysis of a new sample yielded a Z test statistic of 2.17 for this one-sided test to the right.The p-value is = .015.Make a decision on this hypothesis test using a 5% level of significance and state the reason for yourdecision.O Reject the null hypothesis since the p-value is < .05Fail to Reject the null hypothesis since the p-value is < .05O Fail to Reject the null hypothesis since the p-value is not large enoughO Reject the null hypothesis because the p-value is > .01

Given Level of significance ɑ=0.05, p value=0.015

Answered: A set of data was published in the fall…

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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A warehouse manager wants to know if there is an association between the shift worked and being on time for work. To investigate, he selects a random sample of 70 workers and classifies each one according to the shift they worked most recently and whether they were on time for work. He was unable to classify a substantial number of people as being on time, so he classified those individuals as unknown. The data are displayed in the table. The manager would like to know if these data provide convincing evidence of an association between the shift worked and being on time in the large population of all workers at this warehouse. The random and 10% conditions are met. Is the Large Counts condition met? Yes, the smallest expected count is 5, so all expected counts are at least 5. Yes, the smallest expected count is 8.54, so all expected counts are at least 5. No, the smallest expected count is 2.56, so the expected counts are not all at least 5. No, the smallest expected count is…
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A teaching assistant for a psychology course is curious about what factors are associated with higher final grades in the course. She finds that students who read the textbook tend to have higher final grades in the course. She finds that students who watch the lecture videos tend to have higher final grades in the course. Lastly, she finds that students who read the textbook and watch the lecture videos tend to have the highest grades in the course. Assuming that any difference is statistically significant, which of the following best characterizes these results? 1 main effect and O interaction effects 1 main effect and 1 interaction effect O main effects and O interaction effects 2 main effects and 1 interaction effect O main effects and 1 interaction effect 2 main effects and O interaction effects
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