I don’t understand the solution to 4d 4.' set up the 'Ho' and 'Ha' statements for the following, anddraw the bell curves showing the “rejection" or the “fail to reject" (accept)zones for each question.a. Ruth found that the exam scores of students, that attended study hall,increased by 2/3.b. According to Sam, the average number of students that love to shop at TraderJoe's is less than 25.c. It is widely known that the proportion of the number of hours spent doinghomework by a stats student is no more than 80% a week.d. The variance of the number of questions Leah will ask Professor Yankey priorto an exam is 20.

For part d) Claim is variance of number of questions asked is 20

Answered: set up the 'Ho' and 'Ha' statements for…

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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3. Is the following variable discrete or continuous: The number of questions asked during a 1-hour review session.
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A teacher wanted to test that if telling students that a test would be curved to the highest grade would help them perform better on quizzes. She gave quizzes to two groups of 5 students each and told one that there would be a curve and the other group was told there would be no curve given. Following are the scores on the quizzes for the two groups: Yes curve: 75, 80, 78, 87, 90 No curve: 76, 83, 72, 80, 70 Run an independent t test on the data and report the test results using an alpha level of .05. Show ALL work.
In what sense is the mean teh center of distributon? a.M is the center because half the sample scores are always above it and half are below b.M is center because it is always the most probable score in the sample c.M for the sample always equals micro for the population d.M is like a balance point because E (m-x)=0 for every sample.
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set up the 'Ho' and 'Ha' statements for the following, and draw the bell curves showing the "rejection" or the "fail to reject" (accept) 4. zones for each question