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portada The Presence of Long Memory: Comparison of Models: SARIMA, ARFIMA, AND SARFIMA.DE
Type
Physical Book
Publisher
Language
English
Format
Paperback
Dimensions
22x15 cm
ISBN13
9786209100048

The Presence of Long Memory: Comparison of Models: SARIMA, ARFIMA, AND SARFIMA.DE

New Book Imported to South Africa
Delivery: 03 Dec - 09 Dec Shipping: 13 to 14 business days.
R 867
R 867

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Synopsis "The Presence of Long Memory: Comparison of Models: SARIMA, ARFIMA, AND SARFIMA.DE"

One of the greatest challenges in data analysis is selecting the most appropriate model for a given dataset. In practice, model misspecification has often led to incorrect conclusions in data science. This study compares the efficiency of modeling a time series with seasonal long-memory properties using SARIMA, ARFIMA, and SARFIMA models. Monthly average global temperature data were used for the illustration. The temperature series exhibited signs of long memory, as the ACF plot decayed slowly upon further inspection. The Hurst exponent obtained from R/S analysis confirmed the presence of long memory. The ACF showed exponential decay and a sinusoidal pattern, suggesting both non-stationarity and seasonality. Tests for stationarity and seasonality were conducted to verify these observations. Finally, the AIC and BIC criteria were applied to evaluate the efficiency of all three models, and the results indicated that, in the presence of both seasonality and long memory, the SARFIMA model performed most efficiently.

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