Determine whether this study is observational or experimental. In 2006, a research team asked nearly 5000 households for charitable donations to see which methods produced higher amounts. When the solicitor was an attractive female, the average donation increased by 50-130%, especially if a male answered the door.   Observational       Experimental

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A: As per our guidelines we can solve first three sub part of question and rest can be reposted.

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A: From the scatter plot, we get (1,6) (3,2) (4,4) (5,5) (7,8) (8,3)

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A: Here population standard deviation unknown so use t-test

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Q: 14. How did you make the determination in Question #13?

A: Using the given figure, we need to given reason of determination made decision  in question #13.

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