Best Actor 1984: Robert Duvall, Age: 53
Best Supporting Actor 1984: Jack Nicholson, Age: 46
The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2013. The distributions of the ages are approximately bell-shaped. In Exercises 49, compare the z-scores for the actors.

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Best actor Best supporting actor μ ~ 44.0 yr σ 8.8 yr μ 50.0 yr