can-you-please-explain-how-to-do-the-following-worksheet

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I understand statistics when explained correctly but the teacher I have right now is not doing that even after I tell him I don’t understand how he got to an answer.  I would like to know how to do the worksheet attached I don’t want just the answers I want to see how you all come up with the answers and why.

The attached is the worksheet that I must complete but I want to know how you come up with the answers.