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Some of the stages of the Tour de France bicycling championships are over 200 km. In a random sample of 22 riders on Stage 4 of the 2012 Tour de France, Abbeville to Rouen, 214.5 km, times were measured (in minutes), and the sample variance was 4.81 minutes. Assuming normality, find a 99% confidence interval for the true population variance in times for Stage 4 of the Tour de France.

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