The main skill of the day: Expected Value. That's the crucial skill from L-2, part (a). Don't forget that you can label your answer as a mu or E(x), but not x-bar.
Part (b) is another important fact: the law of large numbers. And finally part (d) reminds us that when a distribution is skewed right, the mean is bigger than the median. This fun fact is on the AP test Every. Single. Year.
For our do-now we reviewed 2 skills.
1. ALL the df formulas. Know them. Memorize them.
2. Using Table B and/or invNorm/invT to find z*/t*
Note: All of the above is fair game for Thursday's quest.