Answer :
The mean of the data summarized in the given frequency distribution is 43.2 miles per hour, which is different from the actual mean of 46.5 miles per hour.
To find the mean of the data summarized in the frequency distribution, we need to compute the weighted average. We multiply each speed category by its corresponding frequency, then sum up these products, and finally divide by the total frequency.
For this frequency distribution, the computed mean is 43.2 miles per hour. This is different from the actual mean of 46.5 miles per hour, indicating a discrepancy between the two measures.
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