The trimmed mean is pulled toward the median by

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Unformatted text preview: − 1) s n + n +1 2 = (n − 1) s n + ( ( ) ) 6-61 + [ n 2 x n +1 − 2 x n x n n +1 c) xn = 65.811 inches xn+1 = 64 s n = 4.435 n = 37 s n = 2.106 37(65.81) + 64 x n +1 = = 65.76 37 + 1 37 (37 − 1)4.435 + (64 − 65.811) 2 37 + 1 s n +1 = 37 = 2.098 2 6-103. The trimmed mean is pulled toward the median by eliminating outliers. a) 10% Trimmed Mean = 89.29 b) 20% Trimmed Mean = 89.19 Difference is very small c) No, the differences are very small, due to a very large data set with no significant outliers. 6-104. If nT/100 is not an integer, calculate the two surrounding integer values and interpolate between the two. For example, if nT/100 = 2/3, one could calculate the mean after trimming 2 and 3 observations from each end and then interpolate between these two means. 6-62...
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This document was uploaded on 02/09/2014.

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