I need help with an AP Statistics worksheet.

I shall post a picture, if you can help I'd greatly appreciate it!

Question

I need help with an AP Statistics worksheet. 

I shall post a picture, if you can help I'd greatly appreciate it!

paxpolaris · Answer

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anonymous · Answer

pics?

marissalovescats · Answer

attachment

marissalovescats · Answer

I can do 1 I believe. 

I just enter the 2 different sets of data into 2 different lists right?

anonymous · Answer

http://www.alcula.com/calculators/statistics/scatter-plot/ for number one use this and e nter your data to make the plot

marissalovescats · Answer

Yeah but does it matter which one goes in which list?

anonymous · Answer

for the generatior you would put 1950,203 1950 is the x and 203 is the y thats the format that the generatior would like the press enter and do it again so on and so on

marissalovescats · Answer

Well I plan to use my own calculator so that on a test I can do it on my own for I wont have that website to use

marissalovescats · Answer

Okay I did 1. How would I do 2?

paxpolaris · Answer

just average 1968 and 1970.... i guess

marissalovescats · Answer

I think when it asks for an appropriate model that it wants an equation though. 

Otherwise I'd just take the slope from 1968 to 1970 to estimate the size of 1969?

paxpolaris · Answer

the line joining 1968 and 1950 is an appropriate model, no?

paxpolaris · Answer

*1970

paxpolaris · Answer

for 3  can you do a cubic regression?

marissalovescats · Answer

I got all the answers and figured it all out, but thanks for trying to help anyways, I really appreciate it!

jim_thompson5910 · Answer

as PaxPolaris says for #2, the natural thing to do is to average the two values in the year 1968 and 1970. 

However, a better way is to use the linear regression equation and plug in the x value that corresponds to 1969. This is assuming the data points are linearly correlated.

If using regression is not possible, then you could use the points at 1968 and 1970 to find the midpoint, but that's basically averaging the values.

jim_thompson5910 · Answer

ok great, glad you did

marissalovescats · Answer

Can you explain to me what an extrapolation is?

jim_thompson5910 · Answer

sry just got this message. If we have a bunch of given points (known data values) like shown below

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jim_thompson5910 · Answer

this data is fairly linear, so we can draw a line that gets close to each point as close as possible

|dw:1415845468388:dw|