Question: The table below gives the frequency distribution for waiting times at a clinic: Class Frequency 1 - 5 minutes 6 6 - 10 minutes 11

The table below gives the frequency distribution for waiting times at a clinic: Class Frequency 1 - 5 minutes 6 6 - 10 minutes 11 11 - 15 minutes 9 16 - 20 minutes 6 21 - 25 minutes 4 26 - 30 minutes 3 What is the cumulative frequency of the 11 - 15 class? (i.e. how many patients waited no more than 15 minutes)

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