Answer:
C. Those who have a car tend to have a cell phone.
Step-by-step explanation:
The relative frequency for a data set n is calculated by dividing each frequency [tex]x_i[/tex] by n.
We have a table that relates the use of cars and cell phones.
First, we take from the table the population that has a car.
[tex]n = 18[/tex]
Then, of the students who have a car, 12 have a cell phone and 6 do not have a cell phone.
Then we calculate the relative frequencies [tex]f_{x_i}[/tex] for those who have a cell phone and those who do not.
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Relative frequency Students with car n = 18.
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Cell phone No cell phone Total n
12/18 6/18 18
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Relative frequency Students with car n = 18.
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Cell phone No cell phone Total n
0.666 0.333 18
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Most students who have a car also have a cell phone.
Now we calculate the relative frequency for students who do not have a car.
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Relative frequency Students without a car n = 7
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Cell phone No cell phone Total n
2/7 5/7 7
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Relative frequency Students without a car n = 7
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Cell phone No cell phone Total n
0.286 0.714 7
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Most students who do not have a car do not have a cell phone either.
Then these data suggest that. Those who have a car tend to have a cell phone.
Option C
