Are you sure we had towe ha
We had to use the frequency density
Thankyou soo veryy muchh! You made me smile after 24 hours! Thankyou Fme -
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Biology paper 61... DONE
- Thread starter Micro961
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Thankyou soo veryy muchh! You made me smile after 24 hours! Thankyou Fme 
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we ha
We had to use the frequency density
Er, why? It didn't specify. I just used frequency.. lots of people don't even know what frequency density is if they haven't taken maths :s
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http://uk.answers.yahoo.com/question/index?qid=20090901034742AA0da2S
Hope this will clear your doubts! =D
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Just checked my Bio textbook and revision guide. The histograms in there are both frequency histograms, not frequency density.
The link you provided is just showing how to draw a histogram in general.. but the way we were taught in BIO (not math) was only frequency.
You are so wrong.. First because the link u sent was about histograms in GENERAL.
Secondly if you open the revision checklist for IGCSE BIOLOGY 0610 which is 31 pages.. Scroll down to page 28 and you'll see:
"(f) Histograms
These are drawn when plotting frequency graphs with continuous data, e.g.,
frequency of occurrence of leaves of different lengths. The blocks should be drawn in
order of increasing or decreasing magnitude and they should be touching."
It didn't mention anything to with density + This is a biology exam which tests for BIOLOGY not MATHS.
You are so wrong.. First because the link u sent was about histograms in GENERAL.
Secondly if you open the revision checklist for IGCSE BIOLOGY 0610 which is 31 pages.. Scroll down to page 28 and you'll see:
"(f) Histograms
These are drawn when plotting frequency graphs with continuous data, e.g.,
frequency of occurrence of leaves of different lengths. The blocks should be drawn in
order of increasing or decreasing magnitude and they should be touching."
It didn't mention anything to with density + This is a biology exam which tests for BIOLOGY not MATHS.
:'( :'( So how much am I gonna loose out of 4
But the main requirement that differentiates it from a bar chart is the use of Frequency density, so how can you use FREQUENCY in a HISTOGRAM and not BAR CHART?
But the main requirement that differentiates it from a bar chart is the use of Frequency density, so how can you use FREQUENCY in a HISTOGRAM and not BAR CHART?
In biology, the difference between histograms and bar chart is the gap between the bars, don't worry, you'll only lose a maximum of two marks since you have a right scale and correct order of which is x and y axis
ThanksIn biology, the difference between histograms and bar chart is the gap between the bars, don't worry, you'll only lose a maximum of two marks since you have a right scale and correct order of which is x and y axis
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A formula is a formula,whether its for maths or physics..just like a rule is a rule.
The basic rule with a histogram is that the AREA of the bar shows/tells us the frequency and with a bar chart,the HEIGHT of the bar shows/tells us the frequency.
To find out the area of the bar you multiply its value from the x-axis [the range of lengths] with the y-axis [the frequency density].
If this difference did not exist,there would be no difference between a bar chart and a histogram.
Clearly,in the exam they asked us to draw a histogram,not a bar chart
Could you give me the link for the revision checklist, as I want to make sure I've got all the topics covered.
+What's done is done,its no good arguing about it..focus on your next exam and when the mark schemes come out you can cross check your answer
- Messages
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In biology, the difference between histograms and bar chart is the gap between the bars, don't worry, you'll only lose a maximum of two marks since you have a right scale and correct order of which is x and y axis
The gap between the bars tells you if the chart shows you data on continuous variation or discontinuous.
How I wish you should be right FmeA formula is a formula,whether its for maths or physics..just like a rule is a rule.
The basic rule with a histogram is that the AREA of the bar shows/tells us the frequency and with a bar chart,the HEIGHT of the bar shows/tells us the frequency.
To find out the area of the bar you multiply its value from the x-axis [the range of lengths] with the y-axis [the frequency density].
If this difference did not exist,there would be no difference between a bar chart and a histogram.
Clearly,in the exam they asked us to draw a histogram,not a bar chart
Could you give me the link for the revision checklist, as I want to make sure I've got all the topics covered.
+What's done is done,its no good arguing about it..focus on your next exam and when the mark schemes come out you can cross check your answer
- Messages
- 1,329
- Reaction score
- 600
- Points
- 123
A formula is a formula,whether its for maths or physics..just like a rule is a rule.
The basic rule with a histogram is that the AREA of the bar shows/tells us the frequency and with a bar chart,the HEIGHT of the bar shows/tells us the frequency.
To find out the area of the bar you multiply its value from the x-axis [the range of lengths] with the y-axis [the frequency density].
If this difference did not exist,there would be no difference between a bar chart and a histogram.
Clearly,in the exam they asked us to draw a histogram,not a bar chart
Could you give me the link for the revision checklist, as I want to make sure I've got all the topics covered.
+What's done is done,its no good arguing about it..focus on your next exam and when the mark schemes come out you can cross check your answer
As much as a good point this is, my teacher whose been teaching bio for 15+ years has never mentioned this.
Even in our mocks which were marked EXACTLY according to the mark scheme, there was a histogram question. I used frequency, not frequency density and got full marks for it. The marks are for correct axis labelled with units, there should be no gaps, should use more then half of the y and x axis, and data should be correctly plotted. Im about 110% sure we didn't need frequency density, but then again theres no point in arguing over it since no one knows what CIE is capable of x)
Okay Thankyou
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agreeed..!!!!!!!!!!!!!!!It just had 2 questions!