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Gekata [30.6K]
3 years ago
12

"38% of adults in the United States regularly visit a doctor". This conclusion was reached by a college student after she had qu

estioned 520 randomly selected members of her college. What is the problem with her survey?
Mathematics
2 answers:
Evgen [1.6K]3 years ago
6 0
Bad sample is the answer
Bad White [126]3 years ago
4 0

Answer:

Step-by-step explanation:

Given that a college student concluded "38% of adults in the United States regularly visit a doctor"

For this,  student  questioned 520 randomly selected members of her college

The problem here is

when she is concluding about the adults as a whole in the world, taking into account the total population of adults, 520 is not a proportional size representing the entire population

Also she selected only members of her college.  This may give a biased opinion.  

To get correct idea, she must survey a large sample size from all over the countries and come to conclusion

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If segment DF is an angle bisector, solve for x
klasskru [66]

Answer:

x = 19

Step-by-step explanation:

Since DF is an angle bisector then it divides the opposite sides into segments that are proportional to the other 2 sides, that is

\frac{DE}{DG} = \frac{EF}{GF} , substitute values

\frac{25}{22.5} = \frac{x-9}{9} ( cross- multiply )

22.5(x - 9) = 225 ( divide both sides by 22.5 )

x - 9 = 10 ( add 9 to both sides )

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8 0
2 years ago
A survey on healthy choices was given to gym members at Work It Out. The results
irina [24]

Answer:

The correct option is 4) 0.72.

Step-by-step explanation:

Consider the provided information.

Let us consider that there are 100 members.

(Note: you can take any number the answer will remain the same.)

90% of its members drank protein shakes and of the members who drank  protein shakes.

90% of 100 is 90.

Thus, 90 members drank protein shake.

Of the members who drank   protein shakes, 30% took weight-loss medication.

30% of 90 is 27.

That means 27 out of 90 took weight loss medication.

Out of 100 members 90 drank protein shakes that means 10 members does not take protein shakes.

Only 10% of members  who did not drink protein shakes took weight-loss medication.

10% of 10 is 1, that means 1 member out of 10 took weight loss medication.

Thus the required table is:

                                        Medication   Not Medication      Total

Drank shakes                       27                   63                      90

Doesn't Drank shakes          1                      9                        10

Total                                      28                   72                     100

Now we need to find the probability that a gym member does not take weight-loss medication.

72 out of 100 members does not take weight-loss medication.

Therefore, the required probability is: \frac{72}{100}=0.72

Hence, the correct option is 4) 0.72.

5 0
3 years ago
Need help with this easy math problem
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Answer: 33

Height=33

Step-by-step explanation:

16717.36=3.14*22^2*h/3

h=33

7 0
2 years ago
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Answer:

D = 2 (x +10)

Step-by-step explanation:

3 0
2 years ago
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Answer:

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Step-by-step explanation:

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3 0
2 years ago
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