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The table shows the results of four surveys that randomly sampled 50 families in a town about the number of pets their family has.

0 Pets 1 Pet 2 or More Pets Total
Survey 1 12 13 25 50
Survey 2 20 21 9 50
Survey 3 10 13 27 50
Survey 4 11 12 27 50
Identify surveys that are likely biased. Based on the unbiased surveys, what percent of the families in the town are expected to have 2 or more pets?

40 %

44 %

53 %

59 %

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FauxGeoDuck FauxGeoDuck · Answer 1 · 2017-03-16T21:13:02+01:00

Your answer is c, hope this helps, ask me any questions if needed+

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wagonbelleville wagonbelleville · Answer 2 · 2019-03-07T06:20:48+01:00

Answer:

C. 53%

Step-by-step explanation:

From the table, we see that,

The number of families in Survey 1, 3 and 4 are increasing as the number of pets increases.

But, that is not happening in Survey 2. This might be due to some bias.

Thus, Survey 2 is most likely to be biased.

So, we get the unbiased survey are 1, 3 and 4.

So, the number of families in these surveys having 2 or more pets are,

Survey 1 = 25, Survey 3 = 27, Survey 4 = 27

So, the total number of families having 2 or more pets = 25 + 27 + 27 = 79

Also, the total number of families for the 3 surveys = 50 + 50 + 50 = 150

Thus, the percent of families having 2 or more pets = [tex]\frac{79}{150}\times 100[/tex] = 52.7% ≈ 53%

Hence, option C is correct.