Question

1) 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.

Categories	Observed Frequency	Expected Frequency
A	56
B	40
C	105
D	16
F	16

Test Statistic:
Degrees of Freedom:
p-val:
Decision Rule: Select an answer Accept the Null Fail to Reject the Null Reject the Null
Did something significant happen? Select an answer Significance Happened Nothing Significant Happened
There Select an answer is not is  enough evidence to conclude Select an answer that the teacher's distribution of grades are not as the teacher claims that the teacher's distribution of grades are as the teacher claims

select one - that the teachers distribution grades are not as teachers claim or it is

2) The U.S. Census Bureau computed the proportion of U.S. residents who lived in each of the four geographic regions in the year 2000. There were 19% in the Northeast, 22.9% in the Midwest, 35.6% in the South and 22.5% in the West. Then a simple random sample was drawn of people living in the U.S. in 2011. Can you conclude the distribution in where people live in the U.S. has changed from 2000 to 2011? Use a 10% significance to decide.
Round to the fourth as needed.

Categories	Observed Frequency	Expected Frequency
Northeast	65
Midwest	115
South	143
West	86

Test Statistic:
Degrees of Freedom:
p-val:
Decision Rule: Select an answer Fail to Reject the Null Reject the Null Accept the Null
Did something significant happen? Select an answer Significance Happened Nothing Significant Happened
There Select an answer is not is  enough evidence to conclude

select one -the distribution in where the people lives in US has not changed from 2000-2011 or it has changed

Answer 1