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OpenStudy (kj4uts):
Suppose a sample of 256 was taken from a population with a standard deviation of 128 centimeters. In this case, the sample mean will be within how many centimeters of the population mean 68% of the time? A. 8 B. 6 C. 4 D. 10
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OpenStudy (kj4uts):
I think 68% has 1 standard deviation
OpenStudy (perl):
right
OpenStudy (kj4uts):
is it 1*(128)/sqrt256=8?
OpenStudy (perl):
yes thats correct
OpenStudy (kj4uts):
thank you :)
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