Solution-What proportion are less than 500 miles long

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The data set rivers contains the lengths (in miles) of 141 major rivers in North America.

1. What proportion are less than 500 miles long?

2. What proportion are less than the mean length?

3. What is the 0.75 quantile?

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What proportion are less than 500 miles long : The data set rivers contains the lengths (in miles) of 141 major rivers in North America.

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