Turn on thread page Beta
 You are Here: Home >< Maths

# S1 Histograms Question watch

1. Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

For example, if the class boundaries are
Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

How do you find out what to use for 59-? ?
In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

Help?
2. (Original post by louisedrake)
Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

For example, if the class boundaries are
Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

How do you find out what to use for 59-? ?
In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

Help?
Zacken?
3. (Original post by louisedrake)
Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

For example, if the class boundaries are
Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

How do you find out what to use for 59-? ?
In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

Help?
(Original post by thefatone)
Zacken?
Whatever the end of the range is. If the ages only go up to 80, then it's 80. It all depends on the context.
4. (Original post by Zacken)
Whatever the end of the range is. If the ages only go up to 80, then it's 80. It all depends on the context.
Hi, yeah that makes sense but there was no age limit on this one. For example, another one I tried was Q1 from ex1B of the Cambridge OCR Stats 1 textbook:

The speeds, in mPh, of 200 vehicles travelling on a motorway were measured by a radar device. The results are summarised in the following table.

Speed = 30-40, 40-50, 50-60, 60-70, 70-80, over 80

That's all the info given and in the answer they use 80-100?

How are we meant to figure out that 100 should be used?

Thanks
5. (Original post by louisedrake)
Hi, yeah that makes sense but there was no age limit on this one. For example, another one I tried was Q1 from ex1B of the Cambridge OCR Stats 1 textbook:

The speeds, in mPh, of 200 vehicles travelling on a motorway were measured by a radar device. The results are summarised in the following table.

Speed = 30-40, 40-50, 50-60, 60-70, 70-80, over 80

That's all the info given and in the answer they use 80-100?
Does the 100 even matter? Could you take a picture of such a question, please?
6. Usually you just have to make a logical guess - most mark schemes should give you a little leeway
7. (Original post by cynicphysicist)
Usually you just have to make a logical guess - most mark schemes should give you a little leeway
thanks! that sounds about right haha

Turn on thread page Beta

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 26, 2016
Today on TSR

### He lied about his age

Thought he was 19... really he's 14

### University open days

1. University of Bradford
Wed, 25 Jul '18
2. University of Buckingham
Psychology Taster Tutorial Undergraduate
Wed, 25 Jul '18
3. Bournemouth University
Clearing Campus Visit Undergraduate
Wed, 1 Aug '18
Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE