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Summary STK 120 - Chapter 17 R79,33   Add to cart

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Summary STK 120 - Chapter 17

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STK120 Chapter 17 notes include time series, trend projection, patterns, moving average, seasonal irregular value, multiplicative model, seasonal indices and correction factor . The notes provide an in depth explanation of the concepts and guide you on how to approach the questions.

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  • August 26, 2024
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  • 2024/2025
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CHAPTER 17

, time series pattern : horizontal pattern




7
stationary time series >
sudden change :
regime
> data fluctuates around a change (mean stays same
constant mean with a
,


constant variance over time
.

trend :


&
gradual shift of movement to relative higher/lower values



mx + C
y
=




b, t + bo
y+
=




seasonal pattern :


> same
repeating patterns over successive periods of time
↓ -Both :




upwards
trend




cyclical patterns ins
Tirregular pattern

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