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About LinkBacksDATA SET:
5.3
7.2
5.5
6.5
5.7
4.7
7.5
7.5
7.1
5.4
5.4
4.4
5.7
6.3
4.2
7.1
My work:
Mean: 5.969
St. dev: 1.090
5.969 + (1.090) = 4.879
5.969 - (1.090) = 7.059
Range: 4.879-7.059
8 of 16 values are in that range
answer 50%
WHERE DID I GO WRNOG?
DATA SET:
5.3
7.2
5.5
6.5
5.7
4.7
7.5
7.5
7.1
5.4
5.4
4.4
5.7
6.3
4.2
7.1
My work:
Mean: 5.969
St. dev: 1.090
5.969 + (1.090) = 4.879
5.969 - (1.090) = 7.059
Range: 4.879-7.059
8 of 16 values are in that range
answer 50%
WHERE DID I GO WRNOG?
There are two possibilities:Originally Posted by -DQ-
Because the answer in the book is different.
1. You should have used 1/n weighting in the calculation of the SD rather than 1/(n-1) (they give the same final answer when I do the calculations either way)
2. The book is wrong (what does it think the answer is?)
CB
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