Embedded Files
Lesson aims
Lesson aims
Starter
Starter
- Have a look at the sales data for Apple's iPhone on the graph below..
- How useful do you think the past sales data would have been in accurately forecasting iPhone sales for Q1 and Q2 in 2020?
Plenary
Plenary
- Have a read of this article.
- TechCrunch - Apple will miss revenue forecast as coronavirus impacts its manufacturing and sales
- Has this changed your view of the question asked at the start of the lesson?
Time series analysis
Time series analysis
Time series data are statistics that are recorded over time. The independent variable is time, and the dependent is whatever is being recorded.
A trend is a pattern that is happening often over time. Trends occur in fashion, with clothing that is commonly worn by customer groups. We also mean patterns in sales, for example increasing sales.
- Seasonal fluctuations
- Cyclical fluctuations
- Random fluctuations
Moving averages
Moving averages
- Three-year moving average
- Four-year moving average
- Extrapolation
- Variations
Review
Review
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