Edexcel GCSE Statistics Processing and representing data overview quiz quiz

$60$ degrees

$80$ degrees

$90$ degrees

$120$ degrees

$0.8$

$1.0$

$2.0$

$20$

The midpoint of each class

The lower boundary of each class

The class width

The upper boundary of each class

$100$th

$50$th

$100.5$th

$150$th

$20$

$25$

$45$

$70$

Simply to make the diagram look neater and easier to read

Because the data is continuous, with no gaps on the scale

Because the frequencies of every class are always equal

Because all of the classes are required to have equal width

The lower boundary

The upper boundary

The midpoint

The class width

The class width

The frequency density

The midpoint

The frequency

The exact raw frequencies in two different groups side by side

How a total splits into parts across groups of different sizes

Continuous measurements changing gradually over a period of time

The spread and range of values within a single data set

A high proportion of older people

An equal split of males and females

A high proportion of young people

A small total population

Two different averages, such as both medians

Two separate measures of spread only

Just the minimum and the maximum values

An average and a measure of spread

Positive skew

Negative skew

No skew

It tells you nothing about skew