Quite easy math question :)
Fan + Medal

Question

Quite easy math question :)
Fan + Medal

henrietepurina · Answer

Look back at the data from the New York Marathon.

Year	Competitors*	Year	Competitors*	Year	Competitors*
1976	2.1	1987	22.5	1997	31.4
1977	4.8	1988	23.5	1998	32.4
1978	9.8	1989	25	1999	32.5
1979	11.5	1990	25.8	2000	30
1980	14	1991	26.9	2001	24
1981	14.5	1992	28.6	2002	32.5
1982	14.3	1993	28.1	2003	35.3
1983	15.2	1994	31.1	2004	37.3
1984	14.6	1995	29	2005	37.6
1985	16.7	1996	29	2006	38.4
1986	20.5	* in thousands
Use this original data, but update it with the following information so that it is accurate through 2011. (The 2012 NY Marathon was cancelled due to the aftermath of Hurricane Sandy.) Use the entire data set (1976-2011) to answer all parts of Question 2.

Year	Competitors
(in thousands)
2007	39.2
2008	37.9
2009	43.7
2010	44.8
2011	46.8

henrietepurina · Answer

predict the attendance in 2017

henrietepurina · Answer

can yuo help?

anonymous · Answer

better to graph the data to see the trend...

anonymous · Answer

i'm plotting it now....

henrietepurina · Answer

ok...

xapproachesinfinity · Answer

your data starts from 1962 right?

henrietepurina · Answer

no sir from 1976

xapproachesinfinity · Answer

oh my bad! i see it now

xapproachesinfinity · Answer

the data are raising drastically! could be a polynomial
best thing is to plot the point!

xapproachesinfinity · Answer

points*

henrietepurina · Answer

yes sir except there a few exemptions like 1995, 1996, 2000 and 2001

anonymous · Answer

it isn't straight...

xapproachesinfinity · Answer

yeah there are some drop ups
Not sure it is not straight, that is why i said could be a polynomial

henrietepurina · Answer

ye sir its like |dw:1409969179076:dw|

xapproachesinfinity · Answer

Orion did you plot it?

anonymous · Answer

this is more on regression analysis...

anonymous · Answer

only a few points... still entering the other points...

xapproachesinfinity · Answer

okay!

henrietepurina · Answer

I have 3 questions on this...
Part 1: Find a regression model for this new, updated data set (1976-2011). Explain your method.
Part 2: How well does it fit? Explain your answer and reasoning.
Part 3: Use your model to predict the attendance in 2017.

xapproachesinfinity · Answer

that's way too much of data just looking at it i got puffed out

xapproachesinfinity · Answer

eeh! they are looking for a regression model

henrietepurina · Answer

yes sir sorry I didnt post this earlier the copy.paste cut off

xapproachesinfinity · Answer

@Orion1213 are you using wolfram?

anonymous · Answer

yeah... as i see the data... i know it requires regression analysis

anonymous · Answer

yes i used wolfram but it has limited inputs since i'm just using the online plotter...

anonymous · Answer

now i'm trying meta-calculator...

henrietepurina · Answer

what about DESMOS sir?

xapproachesinfinity · Answer

i see! i think you need to go pro to get more from wolfram

anonymous · Answer

yup... in meta-calculator there are 20 ordered pairs being asked...

henrietepurina · Answer

darn, have you tried DESMOS?

anonymous · Answer

this is the website... http://www.meta-calculator.com/online/i3xf5d4knyhv

henrietepurina · Answer

do you have to use all 20?

anonymous · Answer

to get more accurate result... 1976 to 1995 only for 20 pairs...

henrietepurina · Answer

ok so what did you get sir

xapproachesinfinity · Answer

|dw:1409970704650:dw|
the plots looked like this from the start
i got really lazy to go plot more points haha

henrietepurina · Answer

could you plot this possibly for me in excel?

anonymous · Answer

this is the result so far.... from 1976-1995

henrietepurina · Answer

very nice work sir :)

xapproachesinfinity · Answer

you still need to figure out the model

henrietepurina · Answer

I know its not done yet its missing- 1996 to 2011

anonymous · Answer

yup