Determine if study is experimental or observational


1. Determine if this study is experimental or observational: Researchers monitor the health of smokers and non-smokers.

2. Construct a grouped frequency distribution for the data given below:

92   93   86   81   85   81   86   88   89   93  
83   92   81   93   92   85   93   82   95   86

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Basic Statistics: Determine if study is experimental or observational
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