SCENARIO 6A statistics teacher predicts that the distribution of grades on the final exam will be 25% A's, 30% B's, 35% C's, and 10% D's. The actual distribution of grades on the final exam for 20 students is as follows. Using a 0.05 level of significance, is the statistics teacher's prediction correct? GradeNumber of Students A7B7C5D1 Question 38 Listen Which test are you running? Question 38 options: Chi-square Goodness of Fit One mean t-test ANOVA One mean z-test Question 39 SavedListen What is the null hypothesis? Question 39 options: Ho: The teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's Ho: The teacher's grade distribution does not fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's Question 40 SavedListen What is the alternative hypothesis? Question 40 options: Ha: The teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's Ha: The teacher's grade distribution does not fit the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's Question 41 SavedListen What is the test statistic? Round the answer to two decimal places. Question 41 options: Question 42 Listen What is the p-value? Round the answer to three decimal places. Question 42 options: Question 43 SavedListen What is the conclusion when you compare the p-value and the level of significance (alpha)? Question 43 options: Reject the null hypothesis Fail to reject the null hypothesis Question 44 SavedListen What is the conclusion based on the original claim? Question 44 options: At the 0.05 level of significance, the teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's At the 0.05 level of significance, the teacher's grade distribution does not fit the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's

Given that Grades Frequency A 7 B 7 C 5 D.…

Answered: A statistics teacher predicts that 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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SCENARIO 6

A statistics teacher predicts that the distribution of grades on the final exam will be 25% A's, 30% B's, 35% C's, and 10% D's. The actual distribution of grades on the final exam for 20 students is as follows. Using a 0.05 level of significance, is the statistics teacher's prediction correct?

Grade	Number of Students
A	7
B	7
C	5
D	1

Question 38

Listen

Which test are you running?

Question 38 options:

	Chi-square Goodness of Fit
	One mean t-test
	ANOVA
	One mean z-test

Question 39

Saved

Listen

What is the null hypothesis?

Question 39 options:

	H_o: The teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's
	H_o: The teacher's grade distribution does not fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's

Question 40

Saved

Listen

What is the alternative hypothesis?

Question 40 options:

	Ha: The teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's
	H_a: The teacher's grade distribution does not fit the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's

Question 41

Saved

Listen

What is the test statistic? Round the answer to two decimal places.

Question 41 options:

Question 42

Listen

What is the p-value? Round the answer to three decimal places.

Question 42 options:

Question 43

Saved

Listen

What is the conclusion when you compare the p-value and the level of significance (alpha)?

Question 43 options:

	Reject the null hypothesis
	Fail to reject the null hypothesis

Question 44

Saved

Listen

What is the conclusion based on the original claim?

Question 44 options:

	At the 0.05 level of significance, the teacher's grade distribution fits the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's
	At the 0.05 level of significance, the teacher's grade distribution does not fit the stated distribution: 25% A's, 30% B's, 35% C's, and 10% D's