• Revision on Statistics 1

Histrograms: They are a continuous set of data.
File:histogram-ages.gif
It shows that the bar doesn't have any gaps between them. The formula to calculate them is Frequency Density= Frequency of Class Interval /Width of class Interval.


Grouped Data and Frequency Diagrams: In grouped data, data is shown into groups for example '25<x<or=to 35. This means that the value between 25 and 35 not including 25 but including 35. This data can be shown on a Frequency Polygon.
File:graph_38.gif
Whenever a question has the words Calculate an estimate of the mean you add to columns to your table or data.

Try Learn together, TSR's study area

46,398
revision notes

54,713
mindmaps

57,764
crosswords

18,297
quizzes

create
a study planner

thousands
of discussions


The home of Results and Clearing

1,211

people online now

1,567,000

students helped last year
Poll
How are you feeling about GCSE results day?

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