Time Series

This time series plot is an example of:

• An increasing trend

• Seasonal variation

• A decreasing trend

• A structural change

This time series plot is an example of:

• Seasonality

• An increasing trend

• Irregular variation

• Cyclical variation

This time series plot is an example of:

• Seasonality

• Cyclical variation

• A decreasing trend

• Structural Change

A technique used to level out fluctuations and hence show an overall trend is called...

• Smoothing

• Centring

• Seasonalising

• Rounding

When calculating moving averages with an even number of data points, what should be used? (Unless otherwise stated)

• Centring

• Rounding

• Median smoothing

• Cyclical data smoothing

Using the table shown, calculate the value of the last point of the 3-point moving average.

• 12

• 13

• 12.5

• 11.5

Using the table shown, calculate the value of the first point of the 3 point moving average.

• 2

• 3

• 1.5

• 2.5

Using the table, find the 5-point moving average y-value for t=3

• 66.4

• 65.4

• 62.4

• 64.5

Using the table, find the 4-point centred moving average y-value for t=3

• 60.25

• 48.2

• 241

• 60.6

Using the table, find the 4-point centred moving average y-value for t=4

• 62.125

• 49.7

• 248.5

• 63.16