7 KEY Region 1 = NW Population 1 = Under 50,000 Region 2 = SW Population 2 = 50,
ID: 3069521 • Letter: 7
Question
7
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
1
38
35
43
32
148
2
53
38
27
30
148
3
34
37
36
47
154
Total:
125
110
106
109
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:
What is the probability a selected restaurant is in the north?
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:
North means that NW or NE i.e. region 1 or region 3
P(North)=P(NW)+P(NE)=P(region 1)+P(region 3)
=(125/450)+(106/450)
=231/450
=0.5133
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