Inferences on Two Populations

# Measurements g baker department of statistics g

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Unformatted text preview: ements are average measurements more than 0.10 greater than operator 1’s more measurements. measurements. G. Baker, Department of Statistics G. University of South Carolina; Slide 27 Difference Between Independent Means, Difference µ1 - µ2 Equal variances: y1 − y2 ± tα / 2 s p 11 + n1 n2 ( y1 − y2 ) − ( µ1 − µ 2 ) 0 t= 11 sp + n1 n2 2 2 (n1 − 1) s1 + (n2 − 1) s2 sp = n1 + n2 − 2 Unequal variances: y1 − y2 ± tα / 2 2 1 2 2 s s + n1 n2 t df = ( y1 − y2 ) − (µ1 − µ 2 )0 2 s12 s2 + n1 n2 G. Baker, Department of Statistics G. University of South Carolina; Slide 28 Difference between dependent samples, µD Difference y D ± tα / 2 sD nD y D − D0 t nD −1 = s D / nD G. Baker, Department of Statistics G. University of South Carolina; Slide 29...
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