OCR GCSE Mathematics Statistics overview quiz quiz

The height of a plant

The number of pets a person owns

Shoe size

The number of cars in a car park

$5$

$8$

$7$

$5.5$

$7$

$6$

$8$

$35$

$3.8$

$12.7$

$38$

$4$

$7.5$

$15.0$

$5.0$

$30.0$

$20$

$60$

$2$

$40$

$40$

$2$

$20$

$60$

The frequency

The frequency density

The class width

The midpoint

Minimum, lower quartile, median, upper quartile and maximum

Only the mean and the range, with no quartiles or extreme values shown

The frequency of each separate category as a series of bars

The strength of the correlation between two paired variables

Positive correlation

Negative correlation, with points falling to the right

No correlation, since the points show no clear trend

Zero gradient, meaning the value never changes at all

Interpolation

Extrapolation

Correlation

Causation

The mean point of the data

The origin, where both axes read zero

The single highest plotted data point on the graph

The very first data point that was recorded

A third factor, hot weather, drives both

The correlation between the two is actually strongly negative

There is genuinely no correlation at all between the two

Eating ice cream is what physically causes the sunburn

Library visitors are more likely to read a lot

Libraries are always far too quiet for any survey to work

The sample chosen is simply far too large to be useful

Reading habits cannot be measured in any survey at all