It is believed that the sales volume of one-liter Pepsi bottles depends on the price of the bottle and the price of a one-liter bottle of Coca-Cola. The following data have been collected for a certain sales region. The linear model Pepsi Sales = β₀ + β₁Pepsi Price + β₂Cola Price + ε and the log-log model ln(Pepsi Sales) = β₀ + β₁ln(Pepsi Price) + β₂ln(Cola Price) + ε have been estimated as follows: Using Excel or R, which of the two models provides a better fit?

Question

It is believed that the sales volume of one-liter Pepsi bottles depends on the price of the bottle and the price of a one-liter bottle of Coca-Cola. The following data have been collected for a certain sales region.

The linear model Pepsi Sales = β₀ + β₁Pepsi Price + β₂Cola Price + ε and the log-log model ln(Pepsi Sales) = β₀ + β₁ln(Pepsi Price) + β₂ln(Cola Price) + ε have been estimated as follows:

Using Excel or R, which of the two models provides a better fit?

Quizplus · Accepted Answer

The Answer of It is believed that the sales volume of one-liter Pepsi bottles depends on the price of the bottle and the price of a one-liter bottle of Coca-Cola. The following data have been collected for a certain sales region. The linear model Pepsi Sales = β₀ + β₁Pepsi Price + β₂Cola Price + ε and the log-log model ln(Pepsi Sales) = β₀ + β₁ln(Pepsi Price) + β₂ln(Cola Price) + ε have been estimated as follows: Using Excel or R, which of the two models provides a better fit?

It Is Believed That the Sales Volume of One-Liter Pepsi