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dezoksy [38]
3 years ago
13

Explain how bias in the survey might have affected the results. A survey asks teens, “Do you, like most teenagers, dislike liste

ning to boring classical music?” The results show that teens dislike classical music. A. The survey only included teens and so it is not representative of the entire population. B. The phrasing of the question suggests a bias against classical music. C. The survey may have included only teens who do not like classical music. D. The survey probably did not include teens who play in a youth symphony orchestra.
Mathematics
1 answer:
Mamont248 [21]3 years ago
8 0
B the phrasing of the question suggest a bias against classical music

that is the answer because they are assuming that no teens like classic music, which is just an opinion, which is bias :)
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Answer:

A).3222

Step-by-step explanation:

For each student, there are only two possible outcomes. Either they are from Latvia, or they are not. We are choosing students without replacement. However, since the sample size is large, we can use the binomial distribution to approximate the hypergeometric distribution.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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This means that p = \frac{96}{480} = 0.2

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P(X < 3) + P(X \geq 3) = 1

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So

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P(X = 1) = C_{10,1}.(0.2)^{1}.(0.8)^{9} = 0.2684

P(X = 2) = C_{10,2}.(0.2)^{2}.(0.8)^{8} = 0.3020

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So

P(X \geq 3) = 1 - P(X < 3) = 1 - 0.6742 = 0.3258

The closest option is A.

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