Question: Second stage 2020 Look once more at the data from Tour de France 2020. In Exercise 52, we looked at the whole history of the

Second stage 2020 Look once more at the data from Tour de France 2020. In Exercise 52, we looked at the whole history of the race, but now let’s consider just the modern era from 1967 on

a) Make a scatterplot and find the regression of Avg Speed by Year only for years from 1967 to the present. Are the conditions for regression met?

b) The years 1999–2005 have been disqualified because of doping. How does this help explain the fact that 9 out of 10 residuals in the final 10 years are negative?

c) Would you extrapolate from this model to predict next year’s winning speed?

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