Hi all,
I would really appreciate your help with this discrepancy that I am not able to explain.
If I go about finding the 95% confidence interval of a set of data by first finding the standard deviation/mean, I am getting a different answer than if I use the Data Analysis Tool --> Descriptive Statistics --> Confidence Level.
For example, for the following data set (n = 16):
14, 9, 11, 9, 14, 10, 13, 14, 15, 13, 11, 11, 10, 14, 11, 13.
stdev = 1.966
average = 12
count = 16
=confidence.norm(0.05,1.966,16) = 0.9635
HOWEVER,
When this set of data is plugged into the "Descriptive Statistics" Tool, I receive a "Confidence Level (95.0%) = 1.0478"
Are these two things measuring separate variables that I am not noticing? How should I be interpreting this?
Thank you in advance!
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