Final answer:
The relationship between the simple and multiple regression estimates of the elasticity of price with respect to nox may or may not align with what was predicted, depending on the specific model and data used.
Step-by-step explanation:
Regression analysis is used to estimate the relationship between two or more variables. When analyzing the relationship between price (P) and nox (N), a multiple regression model may include other variables in addition to just price and nox.
On the other hand, a simple regression model only includes the price and nox variables. The estimates of the elasticity of price with respect to nox in both the simple and multiple regression models can provide different results depending on the inclusion of other variables. The relationship between the simple and multiple regression estimates of the elasticity of price with respect to nox may or may not align with what was predicted in part (ii) of the question, depending on the specific model and data used.