2.4. Use tapply or sapply to give the 95% confidence intervals for the mean income of professionals...
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2.4. Use tapply or sapply to give the 95% confidence intervals for the mean income of professionals by Australian state based on the data in Section 2.9.
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Modern Applied Statistics With S-Plus
ISBN: 9781489928191
1st Edition
Authors: W. N. Venables, B. D. Ripley
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