49. You are told that a 95% CI for expected lead content when traf c ow is...

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49. You are told that a 95% CI for expected lead content when traf c ow is 15, based on a sample of n  10 observations, is (462.1, 597.7). Calculate a CI with con dence level 99% for expected lead content when traf c ow is 15.

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