About 30% of adults say that reading is a fa- vorite leisure activity
5.69      According to the U.S. Census Bureau, in 2007 about 10% of persons between 25 and 30 years old live alone. For a random sample of size n, use the binomial table to find the probability of
(a)   1 or fewer persons living alone when n = 12.
(b)   2 or more persons living alone when n = 12.
(c)    Find the expected number when n = 12.
(d)   1 or fewer persons living alone when n = 20.
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5.70Â Â Â Â Â Â About 30% of adults say that reading is a fa- vorite leisure activity. Let success be the out- come that reading is a favorite leisure activity.
Find the probability that
(a)Â Â Â More than 5 trials are needed in order to obtain 3 successes. (Hint:Â In other words, the event is: at most 2 successes in 5 trials.)
(b)Â Â Â More than 9 trials are needed in order to obtain 5 successes.
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Posted 19 May 2017 03:05 PM
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