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Home Q & A Board Science-Related Homework Help Mathematics
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Mserna19 Mserna19
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6 years ago
It is known that the variance of a population equals 484 . A random sample of 81 observations is going to be selected from the population.
 a. With an .80 probability, what statement can be made about the size of the margin of error?
  b. With an .80 probability, what sample size would have to be selected to provide a margin of error of 3 or less?
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#1
6 years ago
a . There is a .80 probability that the sample mean will provide a margin of error of 3.129 or less.
b. 89
Mserna19 Author
wrote...
#2
6 years ago
NICEEE!
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