Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #27 20060103 22:10:49
Re: Rounding .5 up or down?It depends on what you round. IPBLE: Increasing Performance By Lowering Expectations. #28 20060103 22:12:33
Re: Rounding .5 up or down?I actually think IPBLE: Increasing Performance By Lowering Expectations. #29 20060104 04:33:42
Re: Rounding .5 up or down?To put another nail in the coffin... "In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..." #30 20060104 21:57:41
Re: Rounding .5 up or down?Yes. IPBLE: Increasing Performance By Lowering Expectations. #31 20060104 23:54:49
Re: Rounding .5 up or down?Taka a random bill. Estimate it by rounding off the cents (or pence, or centavos or whatever). "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #32 20060105 00:00:18
Re: Rounding .5 up or down?Or the best answer: IPBLE: Increasing Performance By Lowering Expectations. #33 20060105 01:20:06
Re: Rounding .5 up or down?
That depends on the prices. Most prices tend to be biased towards the high end to make people think things are cheaper than they are. eg, £3.99 etc. Why did the vector cross the road? It wanted to be normal. #34 20060105 01:37:52
Re: Rounding .5 up or down?In an old book I it's sayed that IPBLE: Increasing Performance By Lowering Expectations. #36 20060105 14:40:59
Re: Rounding .5 up or down?I think people like to round up becuase the most public use of rounding is related to money handling. rounding up = more $$$. Aloha Nui means Goodbye. #37 20060105 20:42:39
Re: Rounding .5 up or down?Agree. IPBLE: Increasing Performance By Lowering Expectations. #38 20060106 17:23:53
Re: Rounding .5 up or down?Consider this: you have a bag of sweets containing 10 whole sweets but lots of shrapnel in the bottom of the bag. The shrapnel could make up 3/4 of a sweet yet you'd still say you have 10 sweets. Then in this case, are you not rounding down even though you have more than .5? I don't think you can "prove" which way to round, people just do it to simplify a number, it's not actually a mathematical theory (or somthing). Aloha Nui means Goodbye. #39 20060106 17:50:01
Re: Rounding .5 up or down?Over a large sampling, though, you could choose a method that would lead to the least bias. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #40 20060107 04:26:18
Re: Rounding .5 up or down?
That's an interesting point. Most of our arguments so far have been theoretical, but in practical situations it is usually obvious which method to use. Why did the vector cross the road? It wanted to be normal. 