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Alex Ar [27]
3 years ago
11

Nico has conducted an observational study to learn about how different personal experiences affect car purchases. Nico surveyed

300 new car buyers at the auto mall and found that 75% of the buyers were shopping for the same model of a car they have owned before. What conclusion can Nico make from his study?
A.Owning the same model of a car previously causes a buyer to purchase that car again, but he cannot draw a cause-and-effect conclusion from an observational study.
B. There may be a link between owning a model of a car and buying that model again, but he cannot draw a cause-and-effect conclusion from an observational study.
C.There may be a link between owning a model of a car and buying that model again, and he can draw a cause-and-effect conclusion from an observational study.
D.Owning the same model of a car previously causes a buyer to purchase that car again, but he can draw a cause-and-effect conclusion from an observational study.
Mathematics
2 answers:
Elanso [62]3 years ago
8 0

Answer:

B

Step-by-step explanation:

i got asked the same question and i got it right

brilliants [131]3 years ago
4 0

Answer:

Option B is correct.

Step-by-step explanation:

Nico surveyed 300 new car buyers at the auto mall and found that 75% of the buyers were shopping for the same model of a car they have owned before.

This is 225 customers out of 300.

When people are satisfied with their car's current company and brand and model, they can prefer the same thing again for the same better experience. But this is not 100% proven. We can only say that there may be a link between the two things.

Hence, the conclusion that can be drawn here is :

B. There may be a link between owning a model of a car and buying that model again, but he cannot draw a cause-and-effect conclusion from an observational study.

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Answer:

C)  The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

<u>Discriminant</u>

b^2-4ac\quad\textsf{when}\:ax^2+bx+c=0

\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real roots}

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If 4x+2=5y+3 then y =
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find the probability of picking a red marble and a green marble when 2 marbles are picked (without replacement)from a bag contai
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Answer:

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Step-by-step explanation:

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There are 12 marbles in the bag, and we assume that all marbles have the same probability of being randomly drawn.

Now we draw two marbles, we want to find the probability that one is red and the other is green.

The first marble that we draw does not matter, as we just want the second marble to be of the other color.

So, suppose we draw a green one in the first attempt.

Then in the second draw, we need to get a red one.

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Then the probability is:

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Notice that would be the exact same case if the first marble was red.

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p = 6/11.

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3 years ago
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