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Unformatted text preview: − 1) s n +
n +1
2
= (n − 1) s n + (
( ) ) 661 + [ 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 6103. 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. 6104. 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. 662...
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This document was uploaded on 02/09/2014.
 Spring '14

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