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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The following table shows the ethnic origins of two random samples of students from a Canadian university, one from 2012 and the other from 2022: European 2012 2022 African Asian 308 58 52 364 100 58 Note: Canadian born students are classified according to their ancestry. (a) What would be an appropriate test to check if there has been an overall change in the distribution of ethnic origins among the student population of that university between 2012 and 2022? Justify your answer. ] Other 22 38 (b) Based on your answer in (a) above, test whether there has been an overall change in the distribution of ethnic origins among the student population of that university between 2012 and 2022. Use a 5% significance level and show your detailed manual calculations and all the steps of your hypothesis test (hypotheses, significance level, expected cell frequencies (rounded to 1 decimal), test statistic, decision criteria, critical value and p-value, conclusion with justification). (Manual…
Foxbees magazine published data on the best small firms in 2012. These publicly traded firms have a stock price of at least $5 per share and have reported annual revenue between $5 million and $1 billion. The data below shows the ages of the corporate CEOS for a random sample of these firms. 49 67 59 48 45 49 39 44 37 38 48 38 43 48 62 74 70 58 58 40 74 35 36 54 38 45 54 55 64 75 69 36 55 72 69 60 40 64 39 59 74 52 40 49 38 38 74 50 55 50 R vector Copy to clipboard a) What is the mean of the sample? (Round to 4 decimal places) b) What is the standard deviation of the sample mean or the standard error? (Round to 4 decimal places) c) What is the sample size? (Round to whole number)
Suppose x has a distribution with ? = 90 and ? = 8. (a) If random samples of size n = 16 are selected, can we say anything about the x distribution of sample means? A. Yes, the x distribution is normal with mean ? x = 90 and ? x = 2. B. Yes, the x distribution is normal with mean ? x = 90 and ? x = 0.5. C. Yes, the x distribution is normal with mean ? x = 90 and ? x = 8. D. No, the sample size is too small. (b) If the original x distribution is normal, can we say anything about the x distribution of random samples of size 16? A. Yes, the x distribution is normal with mean ? x = 90 and ? x = 2. B. Yes, the x distribution is normal with mean ? x = 90 and ? x = 0.5. C. Yes, the x distribution is normal with mean ? x = 90 and ? x = 8. D. No, the sample size is too small. Find P(86 ≤ x ≤ 91). (Round your answer to four decimal places.)
Hello, Need steps and answers pls. ty;)
International experience around the world is important in our culture of globalization. According to NAFSA, 54.5% of all American students traveling abroad went to Europe in the 2014-2015 academic year. To determine if there is shift in the proportion of students traveling to Europe, suppose a random sample of 300 students who had studied abroad was taken for the 2015-2016 school year. One-hundred sixty of the students traveled to Europe. a. Conduct a test to determine if the proportion of students traveling to Europe has changed. Be sure to provide a complete write-up. b. Based on the hypothesis test, would you expect 0.545 to be in confidence interval for the proportion? Explain without constructing the interval.
Explain in detail RANDOM ASSIGNMENT OF SUBJECTS.
6) Any basketball fan knows that Shaquille O’Neal, one of the NBA’s most dominant centers of the last twenty years, always had difficulty shooting free throws. Over the course of his career, his overall made free-throw percentage was 53.3%. During one off-season, Shaq had been working with an assistant coach on his free-throw technique. During the next season, a simple random sample showed that Shaq made 26 of 39 free-throw attempts. Test the claim that Shaq has significantly improved his free-throw shooting using a 0.05 significance level. Check the conditions of the Central Limit Theorem for this scenario. Calculate the number of failures.

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