SebK
Posts: 2
Joined: Wed Oct 24, 2007 12:36 pm

how do I graph successful trials?

Postby SebK » Sun Oct 28, 2007 9:35 pm

My experiment is to find "at what height will a marble loop-the-loop?" - found on this website. I started with my guess of 154cm which passed 10 out of 10 trials, but very easily - so I went lower to find the minimum height we needed. Here is what I observed: At 145cm, 10/10 successfully looped the loop, at 137cm, 10/10 suceeded...127cm, 10/10 and 125cm, 8/10 succeeded and 123, 7/10 succeeded. If I'm supposed to graph the dependent & independent variables, how would I do that in a pass/fail test? Also, I started with the dependent var. as the height in cm., and independent as the rise...but it doesn't seem right now that I did the experiment. Could I change the question a bit to fit better (like "What is the minimum height needed for a marble to successfully loop-the-loop?) :?:
Seb
Sebastian

SebK
Posts: 2
Joined: Wed Oct 24, 2007 12:36 pm

PS - Due 11/2

Postby SebK » Sun Oct 28, 2007 9:37 pm

I changed my experiment so you can ignore the other one on my profile about the ping pong!
Sebastian

tdaly
Former Expert
Posts: 1415
Joined: Sat Nov 08, 2003 11:27 pm
Occupation: Planetary Scientist

Postby tdaly » Mon Oct 29, 2007 8:19 am

I would recommend using a bar graph. On the x-axis I would have the each of the heights as a single bar and plot on the y-axis the number of times the marble successfully completed the loop the loop.

Let me know if this isn't clear or if you have any other questions!
All the best,
Terik

deviledcute
Posts: 3
Joined: Wed Nov 21, 2007 9:39 am

Postby deviledcute » Wed Nov 21, 2007 9:47 am

well i would recomend the same axis as Terik but i think a scatter graph might work just as well but i might not have quite got what u r doing.
;) help the deviled cute ;)


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