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Home Work 4
:
1
. A Harris Interactive survey for InterContinental Hotels & Resorts asked respondents, “We
traveling internationally, do you generally venture out on your own to experience culture, or stick
with your tour group and itineraries?” The survey found that 23% of the respondents stick with their
tour group (
USA Today,
January 21, 2004).
a.
In a sample of six international travelers, what is the probability that two will stick with
their tour group?
b.
In a sample of six international travelers, what is the probability that at least two will
stick with their tour group?
c.
In a sample of 10 international travelers, what is the probability that none will stick with
the tour group?
2
. When a new machine is functioning properly, only 3% of the items produced are defective.
Assume that we will randomly select two parts produced on the machine and that we are interested
in the number of defective parts found.
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 Spring '11
 Gispy

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