A statistics teacher claims that, on average, 20% of students in his class get an A, 25% get a B, 35% get a C,10% get a D and the rest get an F. The grades of a random sample of his students over the years is recorded.Test the claim at 10% significance.Round to the fourth as needed.CategoriesABсDFObservedFrequency4133921029ExpectedFrequencyTest Statistic:Degrees of Freedom:p-val:Decision Rule: Select an answerDid something significant happen? Select an answerThere Select an answer enough evidence to concludeSelect an answer

Given that, A statistics teacher claims that, 20% of the students get an A 25% of the students get a…

Answered: 10% get a D and the rest get an F. The…

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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One hundred teachers attended a seminar on mathematical problem solving. The attitudes of representative sample of 12 of the teachers were measured before and after the seminar. A positive number for change in attitude indicates that a teacher's attitude toward math became more positive. The twelve change scores are as follows. 4; 7; −1; 1; 0; 5; −2; 2; −1; 6; 5; −3 Part (a) What is the mean change score? (Round your answer to two decimal places.)
A teacher wants to assign an 'A' grade to everyone that scores in the 80th percentile. The grades are: 8 10 12 15 25 40 50 55 60 75 85 90 What is the 80th percentile value What is the meaning
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In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders (Frequency) Mean Test Score High School Glenwood 82 262 Central 92 311 Lincoln 67 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 82, 92, and 67, whic incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place 80.3. Of course, that is Mean of all ninth grader's scores *
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10% get a D and the rest get an F. The grades of a random sample of his students over the years is recorded. Test the claim at 10% significance.