The following distribution of commuting distances was obtained for a sample of Mutual of Nebraska employees: Distance

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The following distribution of commuting distances was obtained for a sample of Mutual of Nebraska employees:

Distance (miles) Frequency Distance (miles) Frequency 1.0–3.0 2 9.0–11.0 35 3.0–5.0 6 11.0–13.0 15 5.0–7.0 12 13.0–15.0 5 7.0–9.0 50 Find the mean and the standard deviation for the commuting distances.

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