- For each problem I need to see (1) a Normal model, shaded, (2) a z-score with work, and (3) normalcdf(____, _____).
- Question (b) is like the SAT example we discussed in class--use those notes as a guide.
- Question (c) is similar to our in-class example, but...
- For (c), we're finding the % above; this means our z-score will represent the "lower bound," and we'll have to use +infinity (a really large #, 9999) as our upper bound
- Question (d) asks you to find the % between two numbers
- For this example, you will have to find 2 z-scores (find the z-score for 4, then for 6).
- In this case, finding a % between, our z-scores represent the upper and lower bound
- In terms of using your calculator, you can use these general formats:
- % Below (Percentile) Questions:
- normalcdf(-99999, z-score) OR
- For newer calculators: Lower = -9999, Upper = zscore, mu = 0, sigma = 1
- % Above Questions:
- normalcdf(zscore, 99999) OR
- For newer calculators: Lower = zscore, Upper = 99999, mu = 0, sigma = 1
- % Between questions
- normalcdf(lower zscore, upper zscore)
- You can also read through the yellow box (example 2) on page 112-113 for some calculator help
Tomorrow we'll continue to work with the Normal model! On Monday we'll finish our chapter 6 notes, and Tuesday we'll do some practice! Then, Wednesday = unit vocab test and Thursday = test day again!
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