Answered: 1) what is the null hypothesis? 2)…

Name: It is said that the average grade in a physics class taken at Hogwarts
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Description: It is said that the average grade in a physics class taken at Hogwarts University last year was at least 78. Over thousands of students at the university took the course. The head of the department believes that the average is lower. He collects a ra

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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It is said that the average grade in a physics class taken at Hogwarts University last year was at least 78. Over thousands of students at the university took the course. The head of the department believes that the average is lower. He collects a random sample of 25 students and discovers the sample average is 76 with a standard deviation of 3. What can the head of department conclude at the 5% significance level when it comes to evaluating this specific situation?

1) what is the null hypothesis?

2) what is the alternative hypothesis?

3) What is the test statistic?

4) What is the critical value of the test statistic?

5) What is the calculated value of the test statistic?

6) what is the conclusion?

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