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On his way to fitness (Posted on 2015-06-15) Difficulty: 2 of 5
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.

No Solution Yet Submitted by Ady TZIDON    
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Comments: ( Back to comment list | You must be logged in to post comments.)
re: Using calculator app and Excel Comment 10 of 10 |
(In reply to Using calculator app and Excel by Charlie)

Adi, based on the various methods and differing answers so far, this has turned out to be an interesting real-life problem. Kol hakavod!

Just one (picky, picky) comment on some of the solutions: the problem gives the weights to one decimal place. Therefore, despite the myriad virtues of Excel and calculators, one can't state the answer to 2 (or more) decimal places. 
As my physics prof used to say, with a twinkle, "Claiming accuracy not supported by the data is a mortal sin. It's like measuring the width of a room with a meter stick and then stating the answer to the nearest millimeter."     :-)

  Posted by JayDeeKay on 2015-06-16 09:13:29
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