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

Question

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

Accepted Answer

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

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

	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

	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

	Reject the null hypothesis
	Fail to reject the null hypothesis

	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

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