a) b) c) d) Exactly 90 people say they use the Internet. At least 90 people say they use the Internet. That fewer than 90 people say they use the Internet. Are any of the probabilities in parts (a) and (c) unusua
a) b) c) d) Exactly 90 people say they use the Internet. At least 90 people say they use the Internet. That fewer than 90 people say they use the Internet. Are any of the probabilities in parts (a) and (c) unusua
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Question
Please answer C and D using EXCEL:
Transcribed Image Text:A survey of US adults ages 18-29 found that 93% use the Internet. You randomly
select 100 adults ages 18-29 and ask them if they use the Internet.
Find the probability that:
a)
b)
c)
d)
Exactly 90 people say they use the Internet.
At least 90 people say they use the Internet.
That fewer than 90 people say they use the Internet.
Are any of the probabilities in parts (a) and (c) unusual?
Expert Solution
Step 1
Given the information
n= 100
p=93%
p= 0.93
Let X be the number of people use the Internet
X follows the Binomial Distribution with parameter n=100 & p = 0.93
We can find the probability by using the Binomial distribution in Excel.
a) We have to find the probability that exactly 90 people say use the Internet.
we can write it in symbol as
we can use the command
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