KEY Region 1 = NW Population 1 = Under 50,000 Region 2 = SW Population 2 = 50,00
ID: 3069519 • Letter: K
Question
KEY
Region 1 = NW
Population 1 = Under 50,000
Region 2 = SW
Population 2 = 50,000 - 100,000
Region 3 = NE
Population 3 = Over 100,000
Region 4 = SE
Count of Population
Region
Total
Population
1
2
3
4
Total
1
28
56
33
36
153
2
36
36
44
31
147
3
36
48
34
32
150
Total:
100
140
111
99
450
Big Burger is a fast food restaurant that has 450 locations all over the U.S. Use the excel output above to answer the following question.
Question
If a selected restaurant is in a city with a population size under 50,000, what is the probability the restaurant is in the west?
KEY
Region 1 = NW
Population 1 = Under 50,000
Region 2 = SW
Population 2 = 50,000 - 100,000
Region 3 = NE
Population 3 = Over 100,000
Region 4 = SE
Explanation / Answer
Ans:
P(under 50,000)=153/450
(west means that NW or SW )
P(west and under 50,000)=(28+56)/450=84/450
Now,
P(west/under 50,000)=P(west and under 50,000)/P(under 50,000)
=(84/450)/(153/450)
=84/153
=0.5490
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