AQA GCSE Statistics Time series overview quiz quiz

The overall long-term direction of the data over time

A regular pattern that repeats each year

A single unusually high value

The difference between the largest and smallest value

Random variation in the data

Seasonal variation

The long-term trend

A single outlier value

A $2$-point moving average for the data

A $4$-point moving average for the data

A $12$-point moving average

A $6$-point moving average for the data

$60$

$20$

$12$

$15$

At the centre of the values it covers

At the very first value that it covers

At the very last value that it covers in the group

At the start of the whole graph, before the data begins

The mean of all the data

The trend value

The previous value

The largest value

$42$

$8$

$58$

$50$

Moving averages can never be calculated once the data becomes older than a year

Forecasts produced this way can only ever turn out to be negative values

The seasonal effect for each point must always be ignored in a forecast

It assumes the trend and seasonal pattern continue, which may not hold

To smooth out seasonal variation and reveal the underlying trend

To exaggerate the seasonal variation so each repeating peak stands out more

To find the single largest value recorded anywhere in the data

To convert all of the raw data values into percentages

Because even periods cannot be averaged

Because the average falls between two time points and must be aligned with one

Because the data must be doubled first

Because an even number of values always gives a result that has to be rounded off to a whole number first

The frequency

The cumulative total

Time

The trend value

The original raw data values

Only the first and last data points

The seasonal effects

The moving averages