Essay
The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. 
For 300 observations, our rule-of-thumb for number of classes would indicate 9 classes. In this case what is the class interval and why would it be reasonable to use that class interval and only 6 classes?
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The class interval is 1 day. The class i...View Answer
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