Homework%20#9

# Homework%20#9 - Homework#9 6.4 a Weight(probability B...

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Homework #9 6.4 a. Weight(probability) B. Multiply 4 (.2) 0.8 3 (.4) 1.2 2 (.3) 0.6 1 (.1) 0.1 b.           sum equals 2.7 6.14  Empirical Rule: a. 1 std dev (look up tails of proportion given  = 1, (0.1587))  0.68 b. 2 std dev (look up tails of proportion given   = 2, (0.0228))  0.95 c. 3 std dev  (look up tails of proportion given  Z  = 3, (0.0013))  almost 1.00    0.9974 6.15  Central Probabilities a.  1.64  (look up tails of proportion (0.0505)) .90 b. 2.58 (look up tails of proportion (0.0049) .95 c.  0.67  (look up tails of proportion (0.2514)) .50 d.  sketch 6.20  Female Heights: First mean equal 65, standard deviation = 3.5;   Z  =  x - μ / σ ; Z  = 62-65 /3.5;   -0.86;  .1949

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6.23 MDI:  mean = 100; standard deviation =16;   a.   Z  of 120   (1.25) , table;  Z  of 80   (-1.25), table. b.  table
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Homework%20#9 - Homework#9 6.4 a Weight(probability B...

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