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26 June, 07:06

Horn lengths of texas longhorn cattle are normally distributed. The mean horn spread is 60 inches with a standard deviation of 4.5 inches. Calculate the ranges of horn lengths for the middle 99.7% of texas longhorn cattle. Show your work or explain how you got the answer.

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  1. 26 June, 08:25
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    46.5 inches to 73.5 inches

    Step-by-step explanation:

    In a normal distribution, the empirical rule tells us that 99.7% of the data falls within 3 standard deviations from the mean. This means up to 3 below and up to 3 above.

    Each standard deviation is 4.5 inches; this makes 3 standard deviations

    3 (4.5) = 13.5 inches

    This means 3 standard deviations below the mean will be

    60-13.5 = 46.5 inches.

    This means that 3 standard deviations above the mean will be 60+13.5 = 73.5 inches.
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