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Fuel mileage is uniformly distributed between 5 km/L to 12 km/L. What is the probability that on the next trip, fuel mileage is 7.5 km/L?
 one year ago
 one year ago
Fuel mileage is uniformly distributed between 5 km/L to 12 km/L. What is the probability that on the next trip, fuel mileage is 7.5 km/L?
 one year ago
 one year ago

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hartnnBest ResponseYou've already chosen the best response.0
the probability distribution function is 1/(125) as seen from earlier question so for any mileage between 5 and 12, the probability will be 1/(125)
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
uniform probability distribution eh,
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
and i suppose that , measurements are in 0.l L, or are they in 0.5 L units?
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
well if the millage was 7.45 does that get counted as 7.5 ?
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
Very bad question. Two things wrong with it. 1) The probability of anything on the "next" trip is quite dependent on the nature of the next trip. Will you be going east or west in Eastern Wyoming? It makes a very big difference! The expected value of gas mileage on a randomly selected trip would be a better question. 2) More importantly, it's a continuous distribution. The probability of a single value is ZERO (0).
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
@tkhunny i don't believe in bad questions....
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
but you post so many bad questions lgba
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
If it's a legitimate question p(7.5) = 0 for any CONTINUOUS distribution.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
@UnkleRhaukus no question is bad to those who see clearly
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
but you havent provided enough information to answer this question, once again
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
that's what you think
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
there are actually enough information
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
so much so that tkhunny is right
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
what are the increments in milage ?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
you look for too much information
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
hartnn was close. This distribution can be modelled as a rectangle. It's width is 7, the distance from 5 to 12. Thus, it's height must be 1/7. The probability that mileage will be between 5 and 6 can be read from the rectangle. It's a smaller rectangle of length 1 (65) and height 1/7. The probability that mileage will be greater than 8 can be read from the rectangle. It's a smaller rectangle of length 4 (128) and height 1/7. Do you see how this works?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
hmm i don't see how that turns out to be 0 though
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
in real situation milage is a measured quantity, and it will come in incremental values
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
You didn't answer my question. Do you see how those two probabilities are calculated?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
would it be because of the integral?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
i did answer your question
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
You can talk integrals if you want, but a Uniform Distribution is easier. Geometry is sufficient. Given a single value, the width of the rectangle is zero (0). The height is still 1/7. The integral shoudl make it clear, though: \[\int\limits_{7.5}^{7.5} \frac{1}{7} dx = ?? \] Don't evaluate this integral. It is an eyeball problem. With the limits identical, it is zero (0).
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
geometry is boring though...
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
by the way...i thought \[\int \limits_a^a f(x)dx\] is 0 only when f(x) is even?
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
or was it for odd...
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
No. That makes no sense. Get that our of your head. It is zero. You are thinking of [a,a] for odd functions. This is [a,a]. It's zero if it exsits at all.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
i suck in calculus
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
if milage is measured in 0.5 Km/L increments then there are 14 possible out comes, and the probability of milage being 7.5 Km/L will be 1/14, if milage is measured in 0.1 Km/L then there are 70 possible out comes, and the probability of milage being 7.5 Km/L will be 1/70, as the increments \(\Delta x\) , get smaller and smaller , they approach \(\text dx\)
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
Time to stop sucking! More focus. Seems to me, after this brief exposure, that you are a little random about it. Just organize your thinking a little better.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
@UnkleRhaukus there are no increments
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
If mileage is measured in 0.5 Km/L increments, you have written your own problem statement and not answered the question that is asked. I will grant, however, that this may have been additional information shared in class.
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
class? there's no class...
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
That does make it harder to discuss things in class, then, doesn't it?!
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
not class as in etiquette...
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
\[\frac1n\sum{\Delta x} \longrightarrow\frac 1n\int\text dx\]
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
...no increments.....
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
then you get zero, BUT you really should has specified that the increments are infinitesimals in the question if you wanted people to know what you ment
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
yes . bad question
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
you just overcomplicate things
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
you assume data...bad answer
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
math maps reality , reality is complicated,
 one year ago

lgbasalloteBest ResponseYou've already chosen the best response.0
that's your opinion
 one year ago

UnkleRhaukusBest ResponseYou've already chosen the best response.0
then answer to your Hypothetical question is Useless , they answer to my variation on your question is not useless
 one year ago

tkhunnyBest ResponseYou've already chosen the best response.2
You converted me, @UncleRhaukus. On an exam, I would answer this qeustion two ways. 1) Point out the obvious "definition" question that results int eh value zero (0), and 2) Quantize the distribution in some way, as you have done, clearly document me assumptions, and provide some sort of nonzero response. Of course, not everyone can do that on every question. If it was multipchoice and zero (0) wasn't on there, I would cry foul!
 one year ago
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