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AP Statistics / Mr. Hansen |
Name: _________________________ |
Check
for Understanding on Chapter 13
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1. |
Time limit: 20 minutes
(30 for extended time). |
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Slim Southpaw, a left-handed professional baseball pitcher, faced 1400 batters last year, 60% of whom were right-handed. No batter switched handedness during an at-bat. Of the right-handed batters, 70% were called out, 15% received a base on balls, 10% made a hit, and 5% were hit by Slim (i.e., advanced to first base). Slim’s overall record for the year was 71% out, 15% base on balls [note: this is a correction from the in-class version to make the numbers work out better], 10% making a hit, and 4% hit by pitch. |
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(a) |
Is there evidence of an association between handedness of batter and at-bat outcome? If so, determine quantitatively (with a conditional analysis) where the differences are most significant. |
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(b) |
Write your conclusion in AP Statistics terminology and again in plain language Slim could understand. |