Research Paper
Year: 2020 | Month: April-June | Volume: 5 | Issue: 2 | Pages: 341-348
Buys-Ballot Estimates of Quadratic Trend Component and Seasonal Indices and Effect of Incomplete Data in Time Series
Kelechukwu C. N. Dozie1, Stephen O.Ihekuna1
1Department of Statistics Imo State University, Owerri, Imo State, Nigeria
Corresponding Author: Kelechukwu C. N. Dozie
ABSTRACT
This study examines the Buys-Ballot estimates of quadratic trend component and seasonal indices and effect of incomplete data in descriptive time series analysis. This paper is to provide estimates of trend parameters and seasonal indices using Buys-Ballot table with incomplete observations. The methods adopted in this study are 1) Mean imputations 2) Regression imputation 3) Buys-Ballot table for time series decomposition. The methods are based on the row, column and overall means of time series data arranged in Buys-Ballot table with m rows and s columns. The model structure is additive.
Keywords: Incomplete Data, Trend Parameter, Seasonal Indices, Quadratic Trend Cycle Component, Additive Model, Buys-Ballot Table.