Johny, trying to reduce, followed a certain diet
during the month of April.
He recorded his weight
daily at 8:00, naked, using the same balance.
Some of his entries are given below:
Apr 3...........102.6 kg
Apr 8...........101.1 kg
Apr 14.........99.4 kg
Apr 18.........98.7 kg
Apr 22.........98.0 kg
Apr 28..........97.6 kg
Please provide your estimate of his average April weight.
8:00 was not given as AM or PM but I doubt there's much to be gained by considering hours over days. Let's find out.
Fit a least squares line through the data:
weight = -.2052*day+102.7480
then the average is found by day 15.5
-2052*15.5+102.7480=99.5667 kg
We could fit this by hours (assuming AM)
where Apr 3 = 56 hours into the month, etc.
weight =-.00855*hour+102.6111
and then going 360 hours into the month gives
99.53246 kg
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Posted by Jer
on 2015-06-15 12:51:48 |
Statistical approach
