This discussion is now closed.

Check out other Related discussions

- Hnc unit 2 maths
- HNC MATHS A2 Task 3 (Radio Transmitters)
- hnc electrical and electronic engineering maths
- Electrical Engineering maths help with Desmos graphing calculator
- ..
- Edexcel A Level Physics Paper 3: 9PH0 03 - 17th June 2024 [Exam Chat]
- AS AQA physics paper 1
- URGENT A Level Physics Help
- SQA Higher Physics - Paper 2 - 25th April 2024 [Exam Chat]
- Edexcel IGCSE 24th May 2018 Paper 3H Unofficial mark Sceheme
- AQA AS Physics paper 1 2024
- Edexcel IGCSE Higher tier Mathematics A Paper 1 1H (4MA1) - 19th May 2023 [Exam Chat]
- Edexcel GCSE Statistics Paper 1 Higher Tier (1ST0 1H) - 5th June 2024 [Exam Chat]
- OCR GCSE Mathematics Paper 6 Higher (J560/06) - 10th June 2024 [Exam Chat]
- OCR A A-level Physics Unified Physics (H556/03) - 17th June 2024 [Exam Chat]
- Edexcel GCSE Physics Paper 1 Higher (1PH0/1H) - 22nd May 2024 [Exam Chat]
- A Level physics- Waves question (1)
- OCR GCSE Mathematics Paper 4 Higher (J560/04) - 16th May 2024 [Exam Chat]
- s1!
- A level physics further mechanics question (2)

When you plot a cumulative frequency curve should the line go through the origin (0,0)? Thanks!

chewwy

if the cumulative frequency at 0 is 0, then yes.

Thanks for replying. Sorry to be a little ambiguous in the question - here goes again...

Out of a set of 6 data; if the first class width is say 20 - 30 with a frequency of eg: 8 mph ie: first plot from data given is at cf = 8 and speed = 30, and so on for the rest of the data: Query is whether to extend the lower portion of the curve (left hand end) back to cross the x axis at 0 or just with a natural curve or straight line from 30, 8 to perhaps 20, 0 if going with the natural flow ? ie; if not given the data where x or y = 0 do you automatically return the curve to 0 , 0 anyway?

baldy

Thanks for replying. Sorry to be a little ambiguous in the question - here goes again...

Out of a set of 6 data; if the first class width is say 20 - 30 with a frequency of eg: 8 mph ie: first plot from data given is at cf = 8 and speed = 30, and so on for the rest of the data: Query is whether to extend the lower portion of the curve (left hand end) back to cross the x axis at 0 or just with a natural curve or straight line from 30, 8 to perhaps 20, 0 if going with the natural flow ? ie; if not given the data where x or y = 0 do you automatically return the curve to 0 , 0 anyway?

Out of a set of 6 data; if the first class width is say 20 - 30 with a frequency of eg: 8 mph ie: first plot from data given is at cf = 8 and speed = 30, and so on for the rest of the data: Query is whether to extend the lower portion of the curve (left hand end) back to cross the x axis at 0 or just with a natural curve or straight line from 30, 8 to perhaps 20, 0 if going with the natural flow ? ie; if not given the data where x or y = 0 do you automatically return the curve to 0 , 0 anyway?

I think, in this case the c.f on the y axis will go from 0 to whatever it goes up to and then on x it will start at 20 and increase in the intervals stated. So your first plot is, (20,0) because at 20 your c.f is nothing, i.e you havent counted any yet, your next one is at (30, 8), you have to plot it at the end of the interval because you dont know where the data is from. You should join the points together and usually you end up with a diagonal enlongated S shape curve.

Regards

- Hnc unit 2 maths
- HNC MATHS A2 Task 3 (Radio Transmitters)
- hnc electrical and electronic engineering maths
- Electrical Engineering maths help with Desmos graphing calculator
- ..
- Edexcel A Level Physics Paper 3: 9PH0 03 - 17th June 2024 [Exam Chat]
- AS AQA physics paper 1
- URGENT A Level Physics Help
- SQA Higher Physics - Paper 2 - 25th April 2024 [Exam Chat]
- Edexcel IGCSE 24th May 2018 Paper 3H Unofficial mark Sceheme
- AQA AS Physics paper 1 2024
- Edexcel IGCSE Higher tier Mathematics A Paper 1 1H (4MA1) - 19th May 2023 [Exam Chat]
- Edexcel GCSE Statistics Paper 1 Higher Tier (1ST0 1H) - 5th June 2024 [Exam Chat]
- OCR GCSE Mathematics Paper 6 Higher (J560/06) - 10th June 2024 [Exam Chat]
- OCR A A-level Physics Unified Physics (H556/03) - 17th June 2024 [Exam Chat]
- Edexcel GCSE Physics Paper 1 Higher (1PH0/1H) - 22nd May 2024 [Exam Chat]
- A Level physics- Waves question (1)
- OCR GCSE Mathematics Paper 4 Higher (J560/04) - 16th May 2024 [Exam Chat]
- s1!
- A level physics further mechanics question (2)

Latest

Trending

Last reply 4 weeks ago

How do l find the min & max radius of a circle on an argand diagramMaths

2

4