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A sample of 25 adult elephants had an average weight of 9,500 pounds, with a sample standard deviation of 150 pounds. Find the 99% confidence

  1. A sample of 25 adult elephants had an average weight of 9,500 pounds, with a sample standard deviation of 150 pounds. Find the 99% confidence interval of the true mean. Assume that the variable is normally distributed.
    a. 9,416.1< 9,583.9
    b. 9,214< 9,786
    c. 944.6< 1,055.4
    d. 11,990< 12,410

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