STA 6166 – Exam 1 – Fall 2010
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Name ___________________________
•
A quality engineer in a factory is interested in the proportion of all computer chips that her assembly line
produces that meet a particular quality requirement. She selects a sample of 100 chips and finds that 85
pass the test. This means that
π
=0.85 is the proportion of all chips the assembly line produces that meet
the requirement.
TRUE
or
FALSE
•
A plant researcher has measured the amount of growth among five plants that received a growth
formula. He finds that the amounts of growth were: 16, 20, 24, 18, 22 cm. Give the sample mean,
median, and standard deviation of the amounts of growth.
•
A sample of 6 animals of a particular species is selected at random from the population being managed
in a wildlife refuge. If 15% (0.15) of the population have a particular trait, what is the probability that
none of the 4 tested have the trait?
•
A new simpler (LA) test for bird flu is compared with the existing gold standard (HI) test, with the
following results. Assume the gold standard (HI) test is completely accurate:
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 Fall '08
 Staff
 Statistics, Standard Deviation, Statistical hypothesis testing, bird flu

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