A car dealership sells both new and used cars. The number of new cars sold on a given day ranges from 5 to 30 while the number of used cars sold ranges from 5 to 40. The number of used cars sold is mutually exclusive to the number of new cars sold. Which statistic would be used to compare the number of new and used car sales on any given day?

The Z-score is a measure of how many standard deviations an element is from the mean of a dataset. It is typically used for continuous data and is not suitable for comparing frequencies of categorical variables like new and used car sales. This makes it an inappropriate choice for this context.

The F-statistic is primarily used in the context of analysis of variance (ANOVA) to compare variances among groups. While it can be helpful in comparing means across multiple groups, it is not applicable for analyzing categorical sales data, making it unsuitable for this comparison.

R-squared is a statistical measure that represents the proportion of variance for a dependent variable that's explained by an independent variable or variables in a regression model. As it pertains to continuous data and regression analysis, it does not apply to comparing categorical counts of new versus used car sales.