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February 22, 2026, 03:58:16 am
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Author Topic: exam1 core question 10  (Read 3247 times)  Share 

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joechan521

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exam1 core question 10
« on: November 06, 2007, 09:49:58 am »
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its the question about which graph suits the car size vs salary
i thought the answer was e) percentage segmented bar chart
but itute had the answer as a scatter plot
can anyone confirm an answer?
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Odette

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Re: exam1 core question 10
« Reply #1 on: November 06, 2007, 09:53:28 am »
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Quote from: "joechan521"
its the question about which graph suits the car size vs salary
i thought the answer was e) percentage segmented bar chart
but itute had the answer as a scatter plot
can anyone confirm an answer?


How on earth could it be a scatterplot?? lol
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joechan521

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Re: exam1 core question 10
« Reply #2 on: November 06, 2007, 09:54:53 am »
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Quote from: "Odette"
Quote from: "joechan521"
its the question about which graph suits the car size vs salary
i thought the answer was e) percentage segmented bar chart
but itute had the answer as a scatter plot
can anyone confirm an answer?


How on earth could it be a scatterplot?? lol


i dunno, the working they gave was catageorical data converted to numerical
im confused
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dashkenny

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exam1 core question 10
« Reply #3 on: November 06, 2007, 09:58:40 am »
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i'm 100% sure it's E

because you could convert one of them into numerical and still get E (and E also shows the distinction between each category)

if it's A its fukkked up T_T
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joechan521

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exam1 core question 10
« Reply #4 on: November 06, 2007, 10:00:53 am »
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Quote from: "dashkenny"

if it's A its fukkked up T_T

if it's A i'm fukkked up
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dxb

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exam1 core question 10
« Reply #5 on: November 06, 2007, 10:07:27 am »
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I have no idea how you could possibly graph it on a scatter plot....isnt a scatter plot ment to have values "scattered"?

lol, i got E too. But apparently our maths teachers debated it and came out with A.....
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Odette

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exam1 core question 10
« Reply #6 on: November 06, 2007, 10:19:21 am »
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Quote from: "dxb"
I have no idea how you could possibly graph it on a scatter plot....isnt a scatter plot ment to have values "scattered"?

lol, i got E too. But apparently our maths teachers debated it and came out with A.....


Oh could it be that the scatterplot would show the relationship (association) between the two variables?

I'm not sure lol

But then again both are categorical data not numerical :?

Ahhh lol, but you could label them 1,2,3 i guess =]

SO IT'S A VALID ANSWER LOL!!
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joechan521

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exam1 core question 10
« Reply #7 on: November 06, 2007, 10:41:30 am »
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oh wtf, why must vcaa put such a shit question, they should put something asking the range, or min-x of some data
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AhaShake

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exam1 core question 10
« Reply #8 on: November 06, 2007, 10:41:40 am »
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it cant be scatter plot
here is a quick one i whipped up proving the impossibility of scatter plot being the correct answer.



that doesnt tell us much at all does it?

compared to



cha ching we have a winner
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joechan521

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exam1 core question 10
« Reply #9 on: November 06, 2007, 10:43:25 am »
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yeah, thats exactly what i thought with scatterplot,
but should the iv be carsize? so carsize is at x-axis?
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Odette

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exam1 core question 10
« Reply #10 on: November 06, 2007, 10:45:44 am »
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Quote from: "AhaShake"
it cant be scatter plot
here is a quick one i whipped up proving the impossibility of scatter plot being the correct answer.

(Image removed from quote.)

that doesnt tell us much at all does it?


How do you know it will turn out like that?
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AhaShake

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exam1 core question 10
« Reply #11 on: November 06, 2007, 10:49:35 am »
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well i think it is reasonably fair to assume that there will be atleast one in each salary catagory with a small, medium or large car. if not, say take out large and low salary. it still doesnt actually tell us anything meaningful, just that yes there are medium salary earners with a medium sized car. how many? what percent? scatter plot just wouldnt work.
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Lyonzy

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exam1 core question 10
« Reply #12 on: November 06, 2007, 01:36:15 pm »
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Has anybody been told about ordinal categories? It isn't on the study design, but i heard it at a TSFX lecture. They are basically categories which have an order to them, like first, second or third. I think that the variables in q10 are categorical ordinal, and therefore best displayed in a percentaged segmented bar chart. If salary was measured in dollars and car size in cubic metres then i would say a scatterplot, but since there's only three of them then its probably unlikely to show a relationship (imo).
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hifer

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exam1 core question 10
« Reply #13 on: November 06, 2007, 01:38:13 pm »
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Quote from: "Lyonzy"
Has anybody been told about ordinal categories? It isn't on the study design, but i heard it at a TSFX lecture. They are basically categories which have an order to them, like first, second or third. I think that the variables in q10 are categorical ordinal, and therefore best displayed in a percentaged segmented bar chart. If salary was measured in dollars and car size in cubic metres then i would say a scatterplot, but since there's only three of them then its probably unlikely to show a relationship (imo).


Ya, the TSFX lecture notes tell us that 2 categorical variables such as in this question should be plotted with a Segmented bar chart. They are not numerical variables and thus a scatter plot can't be used.
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maxleng

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exam1 core question 10
« Reply #14 on: November 06, 2007, 01:54:35 pm »
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Quote from: "AhaShake"


(Image removed from quote.)

cha ching we have a winner


awsome work there..

it is clear that there are 2 CATEGORICAL VARIABLES and that is best displayed by segmented bar charts.

i think some people are thinking into it abit too much, i really strugle to see how it can be a scatterplot
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