oca-Cola Revenues ($ millions), 2005–2010 Quarter 2005 2006 2007 2008 2009 2010 Qtr1 5,200 5,103 6,055 7,340 7,110 7,600 Qtr2 6,296 6,445 7,685 9,025 8,204 8,651 Qtr3 6,023 6,394 7,642 8,293 8,005 8,403 Qtr4 5,537 5,885 7,283 7,005 7,456 10,471 1. Use MegaStat or Minitab to deseasonalize Coca-Cola’s quarterly data. 1 2 3 4 2005 2006 2007 2008 2009 2010 mean 2. State the adjusted four quarterly indexes. Q1. Q2. Q3. Q4 3. What is the trend model for the deseasonalized time series? yt= xt+ State the model found when performing a regression using seasonal binaries. yt= + t+ Q1+ Q2+ Q3 4. Use the regression equation to make a prediction for each quarter in 2011. Quarter Predicted Q1 Q2 Q3 Q4
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
| Coca-Cola Revenues ($ millions), 2005–2010 | ||||||
| Quarter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Qtr1 | 5,200 | 5,103 | 6,055 | 7,340 | 7,110 | 7,600 |
| Qtr2 | 6,296 | 6,445 | 7,685 | 9,025 | 8,204 | 8,651 |
| Qtr3 | 6,023 | 6,394 | 7,642 | 8,293 | 8,005 | 8,403 |
| Qtr4 | 5,537 | 5,885 | 7,283 | 7,005 | 7,456 | 10,471 |
1. Use MegaStat or Minitab to deseasonalize Coca-Cola’s quarterly data.
2010
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