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Homework%20#10

# Homework%20#10 - Homework#10 Page 296-297 Page 305-307 Page...

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Homework #10 Page 296-297    6.53,    6.57,   6.58 Page 305-307 6.67,   6.71,  6.72,  6.76 Page 308-311 6.96 Page 296-297   6.53  Education of the Self-Employed Current Population Reports:  μ  = 13.6;   σ  = 3.0 a.  Years of Education of Self-Employed b.    μ  = 13.6 standard error = population standard deviation / square root of sample size   standard error =    σ / sro  n        = 3 / sro 100  = 3 / 10  =  0.30 c.    μ  = 13.6 standard error =    σ / sro  n        = 3 / sro 400  = 3 / 20  =  0.15 6.57  Income of farm workers:   μ  = \$500 (New Zealand dollars);   σ  = \$160 Sample size n  = 100 a. standard error =    σ / sro  n        = 160 / sro 100  = 160 / 10  =  16.0 b.   + / - 3 standard deviations (using standard error)   3 (16) = 48 48 / 16 = 3;  Within 3 standard  Tail at -3.0  p = .0013;   (The cumulative probability that a x is 3 or more standard  deviation below mean.

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