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OpenStudy (anonymous):
help!!!!!!!!!
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OpenStudy (anonymous):
from a normally distributed population a simple random sample of a size 45 is taken the mean of a sample is 110 and the standard deviation of the sample is 6. what is the 90% confidence interval for the population mean round to the nearest tenth
OpenStudy (tkhunny):
Have you considered calculating the Estimated Population Standard Deviation? Something to do with the sample size and the sample standard deviation...
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