hongco1990
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- Sep 13, 2009
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Qmb pass
Hi all,
Im a bit lost in this exercise (from PASS Kevin-Fiona). Hope you guys will help me out with this. Ta.
Population is normally distributed. Standard deviation of 20mins. How large a sample if wanna achieve 90% confidence within 1min?
I know we gotta use the sample size formula, but does the difference in time (20mins and 1min) matter in this case?
Hi all,
Im a bit lost in this exercise (from PASS Kevin-Fiona). Hope you guys will help me out with this. Ta.
Population is normally distributed. Standard deviation of 20mins. How large a sample if wanna achieve 90% confidence within 1min?
I know we gotta use the sample size formula, but does the difference in time (20mins and 1min) matter in this case?
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