Question

A survey of adults ages 18-29 found that 85% use the Internet. You randomly select 157 adults ages 18-29 and ask them if they use the Internet. (a) Find the probability that exactly 134 people say they use the Internet. (b) Find the probability that at least 134 people say they use the Internet. (c) Find the probability that fewer than 134 people say they use the Internet. (d) Are any of the probabilities in parts (a)-(c) unusual? Explain. Use a normal approximation to the binomial distribution if possible.

Answer #1

d) ( since we use approximate value not exact value)

A survey of adults ages? 18-29 found that 93?% use the Internet.
You randomly select 132 adults ages? 18-29 and ask them if they use
the Internet.?
(a) Find the probability that exactly 125 people say they use
the Internet.?
(b) Find the probability that at least 125 people say they use
the Internet.?
(c) Find the probability that fewer than 125 people say they use
the Internet.
?(d) Are any of the probabilities in parts? (a)-(c) unusual?
Explain.

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3737%
say their favorite sport is professional football. You randomly
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120120
adults and ask them if their favorite sport is professional
football.(a) Find the probability that at most
6666
people say their favorite sport is professional football.(b)
Find the probability that more than
3333
people say their favorite sport is professional football.(c)
Find the probability that between
4343
and
5151
people, inclusive, say their favorite sport is professional
football.
(d) Are any of...

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Round intermediate answers to five decimal places. Round your final
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- Find the probability that the number of people who say auto
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Graph.

a
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in
a survey of 3303 adults ages 57 through 85 years, it was found that
80.2% of them used at least one prescription medication. Complete
parts 1-3 below
1: how many of the 3303 subjects used at least one
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2: construct a 90% confidence interval estimate of the
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3: what do the results tell us about the proportion of The
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According to a study, 78% of adults ages 18-29 years had
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175 adults like chocolate? (b) What is the probability that at most
168 adults like chocolate? (c) What is the probability that between
167 and 177 adults, inclusive, like chocolate?

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