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according to lear center local news archive the average amount of time that a half hour...

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Basic Math

according to lear center local news archive the average amountof time that a half hour local tv news broadcast devotes to usforeign policy, including the war in iraq, is 38 seconds. (time,february 28, 2005). suppose a random sample of 40 such half-hournews broadcasts shows that an average of 38 seconds are devoted tous foreign policy with a standard deviation of 9 seconds. Find a95% confidence interval for the mean time that all half-hour localTV news broadcasts devote to U.S. foreign policy.

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Solution Given thatPoint estimate sample mean 38sample standard deviation s 9sample    See Answer
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