The number of sick days taken (per month) by 200 factory workers is summarized below. Number of Days   Frequency 0 − 5     110   6 − 10     70   11 − 15     13   16 − 20     7   The cumulative percent frequency for the class of 16−20 is _____.   a. 90%     b. 10%     c. 100%     d. 3.5%

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The number of sick days taken (per month) by 200 factory workers is summarized below.

Number of Days   Frequency
0 − 5     110  
6 − 10     70  
11 − 15     13  
16 − 20     7  

The cumulative percent frequency for the class of 16−20 is _____.
  a. 90%  
  b. 10%  
  c. 100%  
  d. 3.5%
A researcher has collected the following sample data. The mean of the sample is 7.



  5 6 16 4 4


The interquartile range is _____.
  a. 2  
  b. 12  
  c. 4  
  d. 16

 

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