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STAT 503 Quiz II

  1. Value in z-table
    area under the curve to the left
  2. Random Variables: mean
    • Die:
    • 1(1/6) + 2(1/6) … 6(1/6) = 3.4
  3. Random Variables: Variance
    • Die:
    • (1-3.4)2/6 + (2-3.4)2/6 … + (6-3.4)2/6 = 2.916
  4. Binomial
    • "exactly 'y' successes in 'n' trials"
    • Pr(Y=y) (n choose y)*py(1-p)n-y
  5. Z-value calculation
    Z = (Y-mean)/ SD
  6. Image Upload 2
    normal
  7. Image Upload 4
    outliers in both directions
  8. Image Upload 6
    • Skewed left
    • outliers left (more bigger)
  9. Image Upload 8
    • Skewed right
    • outliers right (more smaller)
  10. Pˆ
    • Sample probability
    • Y/n
    • Pr(Y/n = p*) = Pr(Y= np*)
    • linear transformation of Y
  11. if n increases
    • less standard deviation and will reflect reality
    • decreases by a factor of n/√n
Author
MRK
ID
262385
Card Set
STAT 503 Quiz II
Description
Independence, choose, excatly
Updated

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