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Friday 9/25

Woah, Friday math class came outta nowhere!




^That get's funnier every time.

Anyway, you're gonna do some practice finding medians and estimating means, then you will work on your homework.

Practice (Individual):

  1. Find the median of the following lists of numbers
    • 100, 200, 300
    • 35, 34, 35
    • 92, 86, 75, 46, 38, 28, 10
    • 2, 4, 6, 8
    • 100, 200, 300, 400
    • 3, 13, 7, 5, 21, 23, 39, 23, 40, 23, 14, 12, 56, 23, 293, 13, 7, 5, 21, 23, 23, 40, 23, 14, 12, 56, 23, 29
  2. Estimate the mean of the following:
    • 4, 7, 8, 8, 10
      • I'll do this one for you, and write out my thoughts.
      • The median is 8. The two bigger numbers are 8 and 10, the two smaller numbers are 4 and 7. The smaller numbers are further from 8 than the bigger numbers, so the mean gets "pulled down by them"... So I would guess 7.
      • (The actual mean is 7.4, so this is a good estimate)
    • 100, 200, 300
    • 2, 4, 6, 8
    • 0, 1, 1, 1, 1, 100
    • 76, 79, 82, 87, 89, 91, 91, 95, 102
Share
  • Any tricks or ways of thinking about median? 
  • Someone who is fast with a calculator, calculate the means from the problems above
  • Check how close your estimates were (don't worry, estimating is its own skill and we will keep practicing it).
    • If your estimates were close, how did you do it? Can you explain any tricks?
Homework

Work on your homework! Hopefully you finish and don't have any this weekend!

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