Mean, Median, and Mode

What is the mean of a data set? How do you find it? (if you need to, look it up!)

What is the median of a data set? How do you find it? (If you need to, look it up!)

What is the mode of a data set? How do you find it? (If you need to, look it up!)

Just try this one: A student has taken 7 tests and received scores of 17, 16, 19, 19, 15, 20, 14. The 8th test is coming up, and the student wants to know what score was needed on the 8th test to have a mean score of 17. Find the necessary test score.

If there is time:

Which average (mean median or mode) do you think is more useful and why?

Reserach: When would the mean be best to use? What about median? And mode?