Question
QUESTION 1 A college prep school advertises that their students are more prepared to succeed in college than other schools. To verify this, they categorize
QUESTION 1
A college prep school advertises that their students are more prepared to succeed in college than other schools. To verify this, they categorize GPA's into 4 groups and look up the proportion of students at a state college in each category. They find that 7% have a 0-0.99, 21% have a 1-1.99, 37% have a 2-2.99, and 35% have a 3-4.00 in GPA.
They then take a random sample of 200 of their graduates at the state college and find that 19 has a 0-0.99, 28 have a 1-1.99, 82 have a 2-2.99, and 71 have a 3-4.00.
Can they conclude that the grades of their graduates are distributed differently than the general population at the school? Test at the 0.05 level of significance.
Hypotheses:
H0: There is______ between the general population and the college prep students in GPA.
H1: There is ______between the general population and the college prep students in GPA.
Select the best fit choices that fit in the two blank spaces above.
Question 1 options:
no difference, a difference
a difference, no difference
no difference, no difference
a difference, a difference
QUESTION 2
An urban economist is curious if the distribution in where Oregon residents live is different today than it was in 1990. She observes that today there are approximately 3,109 thousand residents in NW Oregon, 902 thousand residents in SW Oregon, 244 thousand in Central Oregon, and 102 thousand in Eastern Oregon. She knows that in 1990 the breakdown was as follows: 72.7% NW Oregon, 20.7% SW Oregon, 4.8% Central Oregon, and 2.8% Eastern Oregon.
Can she conclude that the distribution in residence is different today at a 0.05 level of significance?
Hypotheses:
H0: There is________in the distribution of Oregon residents today.
H1: There is________in the distribution of Oregon residents today.
Question 2 options:
no difference, a difference
a difference, no difference
no difference, no difference
a difference, a difference
QUESTION 3
A company operates three machines during three shifts each day. From production records, the data in the table below were collected.
At the .05 level of significance test to determine if the number of breakdowns is independent of the shift.
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