MAT 151 FINAL REVIEW PART 2
1. Suppose the proportion of all adults using the Internet is 2/3.
a)
Find the probability that a random sample of 2013 adults would result in exactly 1358 Internet users.
b)
Find the probability that a random sample of 2013 adults would result in 1328 or more Internet users.
c)
Find the probability that a random sample of 2013 adults would result in fewer than 1341 Internet users.
a)
0.014
=BINOMDIST(1358,2013,2/3,FALSE)
b)
0.754
=1BINOMDIST(1327,2013,2/3,TRUE)
c)
0.471
=BINOMDIST(1340,2013,2/3,TRUE)
2. Men’s heights are normally distributed with a mean of 69.0 inches and a standard deviation of 2.8 inches.
A random
sample of 50 men is selected.
a)
Find the mean of the sampling distribution
b)
Find the standard deviation of the sampling distribution
c)
What is the probability that this sample of 50 randomly selected men will have a mean height between 67.8 and 69
inches?
d)
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 Spring '11
 BROWN
 Normal Distribution, Probability, Standard Deviation, Melissa

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