Draw a scatterplot of Time versus Year, using a different symbol for men and women. Comment on the graph. Fit a regression model with intercepts and slopes for each gender. Provide an interpretation...

Draw a scatterplot of Time versus Year, using a different symbol for men and women. Comment on the graph.

Fit a regression model with intercepts and slopes for each gender. Provide an interpretation of the slopes.

Find the year in which the female record is expected to be 240 seconds, or 4 minutes. This will require inverting the fitted regression equation. Use the delta method to estimate the standard error of this estimate.