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This quiz is designed to test your knowledge of all Data Analysis concepts in column 2. It's also designed to test whether you should "move on" to column 3. I envision three scenarios:

If you scored 21, 22, 23, or 24, review any concepts you missed, but move on to column 3.
If you scored 19 or 20, review any concepts you missed, and, if you have time, go through column 2 again before moving on to column 3.
If you scored below 19, go through column 2 videos and short quizzes again. Yes, all of them. Even if you're reviewing concepts you got right, it will further reinforce them.

If you go through all column 2 videos and quizzes again, make sure you take Tickbox Quiz #14 again to confirm your progress.