Time series

Worked examples (9)

• 1Recovering the chronological order from a table
• 2Choosing what goes on each axis
• 3Reading values from a time series graph
• 4Plotting the specimen time series graph
• 5Describing the trend and the seasonal pattern
• 6Plotting quarterly data
• 7Finding the errors in a badly drawn graph
• 8Identifying the cycle and evidencing the trend
• 9What a time series graph can and cannot tell you

Model answers (9)

• ✓Model answer — 0479 Paper 1 style — 12.1
• ✓Model answer — 0479 specimen Paper 2 Q9(a) style — 12.1
• ✓Model answer — 0479 specimen Paper 2 Q9(a) mark scheme — 12.1
• ✓Model answer — 0479 Paper 1 style — 12.1
• ✓Model answer — 0479 Paper 2 style — 12.1 (AO2)
• ✓Model answer — 0479 Paper 1 style — 12.1
• ✓Model answer — 0479 Paper 2 style — 12.1 (links to 3.6)
• ✓Model answer — 0479 Paper 1 style — 12.1
• ✓Model answer — 0479 Paper 2 style — 12.1 (AO2)

Worked examples (9)

• 1Calculating a single deviation
• 2Averaging deviations into a component
• 3Saying what a component means
• 4The full specimen calculation
• 5The other two components, and the divisor trap
• 6Reading a component off a graph
• 7All four components for quarterly data
• 8Diagnosing three wrong calculations
• 9Working backwards from a component

Model answers (9)

• ✓Model answer — 0479 Paper 1 style — 12.5
• ✓Model answer — 0479 Paper 2 style — 12.5
• ✓Model answer — 0479 specimen Paper 2 Q9(c) — 12.5
• ✓Model answer — 0479 specimen Paper 2 Q9(c) follow-on — 12.5 (AO2)
• ✓Model answer — 0479 Paper 1 style — 12.5
• ✓Model answer — 0479 Paper 2 style — 12.5
• ✓Model answer — 0479 Paper 1 style — 12.5
• ✓Model answer — 0479 Paper 2 style — 12.5
• ✓Model answer — 0479 Paper 2 style — 12.5 (AO2)

Worked examples (9)

• 1Drawing the trend line
• 2Reading a trend value from an extended line
• 3Combining a trend value with a component
• 4The complete specimen prediction
• 5Predicting from a trend line given as an equation
• 6Stating the assumptions
• 7Why a distant prediction fails
• 8Diagnosing three failed predictions
• 9Evaluating a prediction in context

Model answers (9)

• ✓Model answer — 0479 Paper 1 style — 12.4
• ✓Model answer — 0479 specimen Paper 2 Q9(d) — 12.4
• ✓Model answer — 0479 Paper 2 style — 12.6
• ✓Model answer — 0479 Paper 1 style — 12.6
• ✓Model answer — 0479 specimen Paper 2 Q9 follow-on — 12.6
• ✓Model answer — 0479 Paper 2 style — 12.6
• ✓Model answer — 0479 Paper 1 style — 12.6 (AO2)
• ✓Model answer — 0479 Paper 2 style — 12.6
• ✓Model answer — 0479 Paper 2 style — 12.6 (AO2)

Worked examples (9)

• 1Choosing how many points to average
• 2Calculating the first two 3-point moving averages
• 3Deciding whether centring is needed
• 4Calculating all seven moving averages
• 5Calculating a 4-point moving average
• 6Centring a 4-point moving average
• 7Why the number of points must match the cycle
• 8Working backwards from a moving average
• 9A 7-point moving average of daily data

Model answers (9)

• ✓Model answer — 0479 Paper 1 style — 12.2
• ✓Model answer — 0479 Paper 2 style — 12.3
• ✓Model answer — 0479 Paper 1 style — 12.3
• ✓Model answer — 0479 specimen Paper 2 Q9(b) — 12.3
• ✓Model answer — 0479 Paper 2 style — 12.3
• ✓Model answer — 0479 Paper 1 style — 12.3
• ✓Model answer — 0479 Paper 2 style — 12.3
• ✓Model answer — 0479 Paper 1 style — 12.3
• ✓Model answer — 0479 Paper 2 style — 12.2 (AO2)