Experimental Design B/C

mpnobivucyxtz
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Re: Experimental Design B/C

Postby mpnobivucyxtz » December 16th, 2018, 4:38 pm

dxu46 wrote:
kate! wrote:
mpnobivucyxtz wrote:for the 1st one, it was an experimental error. Just one of the rubric points says data collection. and we didn't have 0 DV or IV but the line breaks were still incorrect :/

Hmm, I don't see a problem with your explanation of the error... then again, maybe the proctor was just harsh?

Did you describe the error and explain how it affected the data?


"artificially inflated the data (made the values for time too high)"

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Re: Experimental Design B/C

Postby dxu46 » December 16th, 2018, 4:43 pm

mpnobivucyxtz wrote:
dxu46 wrote:
kate! wrote:Hmm, I don't see a problem with your explanation of the error... then again, maybe the proctor was just harsh?

Did you describe the error and explain how it affected the data?


"artificially inflated the data (made the values for time too high)"

Describe as in human/random/etc error

For example,
The data was collected by a manually operated stopwatch read by eye, so human reaction time may have artificially inflated the time recorded. Due to the limited precision of a human being, this can be best described as a human error.

It's not really on the rules, but it's kind of given (I guess?). Maybe the grader was just tired of grading tests and graded based off word choice/sophisticated-ness/whatever.
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Re: Experimental Design B/C

Postby mpnobivucyxtz » December 16th, 2018, 7:30 pm

dxu46 wrote:
mpnobivucyxtz wrote:
dxu46 wrote:Did you describe the error and explain how it affected the data?


"artificially inflated the data (made the values for time too high)"

Describe as in human/random/etc error

For example,
The data was collected by a manually operated stopwatch read by eye, so human reaction time may have artificially inflated the time recorded. Due to the limited precision of a human being, this can be best described as a human error.

It's not really on the rules, but it's kind of given (I guess?). Maybe the grader was just tired of grading tests and graded based off word choice/sophisticated-ness/whatever.


Yup, it was described as human. We split our paragraphs into equipment, human, and built-in errors. We were also DQd at that event tho SO maybe they just didn't care anymore. Thank you anyway :)

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Re: Experimental Design B/C

Postby mpnobivucyxtz » December 16th, 2018, 7:32 pm

dxu46 wrote:
mpnobivucyxtz wrote:
dxu46 wrote:Did you describe the error and explain how it affected the data?


"artificially inflated the data (made the values for time too high)"

Describe as in human/random/etc error

For example,
The data was collected by a manually operated stopwatch read by eye, so human reaction time may have artificially inflated the time recorded. Due to the limited precision of a human being, this can be best described as a human error.

It's not really on the rules, but it's kind of given (I guess?). Maybe the grader was just tired of grading tests and graded based off word choice/sophisticated-ness/whatever.


My question is more about the "important info about data collection" rubric point, since it seems we had it explicitly stated. how do you usually satisfy this?

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Re: Experimental Design B/C

Postby satvik03 » January 9th, 2019, 4:20 pm

Does anyone know how to write a standard of comparison, like what qualifies as one. We always just use the control group thing, and that part is one that we have struggled on in the past two competitions. Thanks! :)
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Re: Experimental Design B/C

Postby kate! » January 9th, 2019, 4:47 pm

satvik03 wrote:Does anyone know how to write a standard of comparison, like what qualifies as one. We always just use the control group thing, and that part is one that we have struggled on in the past two competitions. Thanks! :)

The control group is the standard of comparison. You have to make sure that it is a part of the experiment with the manipulated variable being unmanipulated. For example, a pendulum experiment with a cup and marbles would have their SOC be the cup without any marbles. In experiments where this is harder to define and the manipulated variable is not a quantity, but a type, you have to choose the one that is most "neutral." For example, a paper airplane with copy paper, tissue paper, and card stock would probably choose the copy paper because it is medium thickness and would have an air resistance in between that of the other types.
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Re: Experimental Design B/C

Postby satvik03 » January 9th, 2019, 4:52 pm

Thanks! :)
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Re: Experimental Design B/C

Postby zsg11 » January 25th, 2019, 2:24 am

Hey, does anyone have new prompt ideas to practice? My partners and I have been stuck in a rut of pendulums, rolling/bouncing balls, and properties of water (these are pretty much the only prompts at the invitational level, but that's besides the point) and we need to practice more experiments.
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Re: Experimental Design B/C

Postby CPScienceDude » January 25th, 2019, 7:59 am

zsg11 wrote:Hey, does anyone have new prompt ideas to practice? My partners and I have been stuck in a rut of pendulums, rolling/bouncing balls, and properties of water (these are pretty much the only prompts at the invitational level, but that's besides the point) and we need to practice more experiments.

One prompt I had was with a seesaw. It was pretty fun.
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Re: Experimental Design B/C

Postby Pirates01 » January 25th, 2019, 8:30 am

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Re: Experimental Design B/C

Postby dxu46 » January 26th, 2019, 5:35 pm

zsg11 wrote:Hey, does anyone have new prompt ideas to practice? My partners and I have been stuck in a rut of pendulums, rolling/bouncing balls, and properties of water (these are pretty much the only prompts at the invitational level, but that's besides the point) and we need to practice more experiments.

Some are on the Experimental Design/Practice Wiki, but beware as some of these are...not so good (no offense to the creators) - no topic :/
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Re: Experimental Design B/C

Postby AMAZHANG » January 28th, 2019, 5:30 pm

does anyone know how to approach an experiment with the topic of Distribution? I assume this means distribution in statistics
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Re: Experimental Design B/C

Postby MoMoney$$$;)0) » January 31st, 2019, 9:52 am

Hey fellow user,
I was wondering if any of you guys know any formulas for these new rules since we had one before that used to allow us to place high every time, but it doesn't work anymore. Thanks for the help!

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Re: Experimental Design B/C

Postby CPScienceDude » January 31st, 2019, 10:07 am

MoMoney$$$;)0) wrote:Hey fellow user,
I was wondering if any of you guys know any formulas for these new rules since we had one before that used to allow us to place high every time, but it doesn't work anymore. Thanks for the help!

Use the scoring guidelines in the rules to get maximum points.
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Re: Experimental Design B/C

Postby EmiliaM » February 6th, 2019, 6:54 am

So I just came across an experiment, and have had similar ones in the past, using 4 different types of materials where the topic is absorbency. We had limited measuring devices: only the stopwatch and ruler we can use in competitions. My initial thoughts were doing something like porosity vs amount of water absorbed, or density vs amount of water absorbed. However there would be no way to measure porosity and density with the experiment given, so I would do something for the IV like: low density, medium density, and high density, and the experiment would use a bar graph. Is this even allowed since we couldn’t measure density and only used qualititative observations to determine this? Also what would the SOC be? Any ideas on this, and also for a better experiment idea with this topic?


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