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Estimating mean for known and unknown o for normal distributions 8 1 and 2 a...

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Estimating mean for known and unknown o for normal distributions 8 1 and 2 a Striped whales have an approximate normal distribution of the miles they swim each day If the standard deviation for the population is unknown find the confidence interval if a random sample of 100 striped whales distances swam in one day was 7 620 miles The sum of the squares of these distances was 582 000 Use a confidence level of 90

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