final exam notes sheet

# final exam notes sheet - IQR = Q3 Q1 Upper fence = Q3...

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IQR = Q3 - Q1 // Upper fence = Q3 + 1.5(IQR) // Lower fence = Q1 - 1.5(IQR) 5# summary: Max, Q3, median, Q1, min // for 7#, add mean and SD z = (y - mean) / SD Z-score normal model: Mean = 1, SD = 1 positive skew = right skew = slide you want to sled down = mean > median SD = SQR(SIGMA(y - y-bar)^2)/n-1) to find % occupied between a and b: 2nd, dist, normal cdf (z-score, z-score) OR normal cdf(lower bound, upper bound, mean, SD) invnorm(percent [area] in decimal form, mean, SD) // IQ of bottom 2% = invnorm(98, 100, 15) To go from z-score to data value: y = (z * SD) + mean R = correlation coefficient, association. r^2 = regression / = positive \ = negative residual = observed - predicted PROBABILITY Addition rule for disjoint events: P(A or B) = P(A) + P(B) General addition rule: P(A or B) = P(A) + P(B) - P(A and B) General Multiplication Rule: P(B) * P(A|B) = P(A and B) Multiplication rule for Independent events: P(A and B) = P(A)*P(B) If P(A and B) = P(A) * P(B), then events are independent

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## This note was uploaded on 03/30/2008 for the course STT 200 taught by Professor Dikong during the Spring '08 term at Michigan State University.

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final exam notes sheet - IQR = Q3 Q1 Upper fence = Q3...

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