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Time series Linerar.pptx
1. Time Series Analysis by Using
Secular or Linear Trend Model
Presenter : Aamna Aamir
Roll #: 22011708-002
Subject: Advanced Quantitative Techniques
M.phil 1St Semester
Department of Geography
2.
3. Time Series Analysis
• Time series data: data or observation recorded at regular time
intervals.
• Analysis of any variable measured “over time” called Time Series
Analysis.
• Time series is looking at the data overtime to FORECAST OR PREDICT
what will happen in the nest time period base on:
• Patterns and Recurring trends from previous time periods.
• E.g. Weather Data
• Seasonal sales revenue
5. Time Series Analysis
• e.g.
• Earning of a Firm We can say that Earning depends on:
• Sale
• Consumer Price Index
• GDP etc.
6. Time Series Analysis
• Similarly, Human Induced Activities can alter the climate:
• Fossil Fuels
• Aerosols
• GHG’s
• Ozone Molecules etc.
7. Time Series Analysis
• We can say in January 2023 the Sale was 88% and then Predict for
February 2023.
• Likewise, We can say in January 2023 the GHG’s Emission was 78%
and then Predict for February 2023.
• In Time Series (T.S) Model we look at the particular period of time.
• In T.S we take Variable depending on time.
8. Why Time Series Model different from other
Types Predictive Models
• T.S is based on Given time, and sequence of Observation over time.
• Normally, we could look at the a trend on a graph and take an
educated guess that ”Trend” will probably continue.
• Whereas, in T.S Forecast: can give us a better estimated figure for
how much Time it would continue.
• Example: “ within a specific period of time T.S Model Predicts
100,000 people to Login online ”
• “Prediction is based on Given time.”
9. Components of Time Series
• Secular Trend / Linear Trend
• Cyclic Variation Trend
• Seasonal Variation Trend
• Irregular Variation Trend
31. Semi Average Graphic method
• Benefit:
• Everyone would have same trend line.
• But data odd then ignore central / Middle value.
• And make groups of remaining data.