version 1.9, 2007/08/07 21:29:16
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version 1.10, 2008/02/22 19:22:21
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Line 77 problem parts of the selected students o
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Line 77 problem parts of the selected students o
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To compute the KR-21 reliability statistic the following formula is used: |
To compute the KR-21 reliability statistic the following formula is used: |
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\[KR-21 = \frac{K}{K-1} \cdot \frac{1-(M \cdot (K-M))}{K \cdot s^{2}}\] |
\[KR-21 = \frac{K}{K-1} \cdot \left(1- \frac{M \cdot (K-M)}{K \cdot s^{2}} \right)\] |
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Where |
Where |
\begin{description} |
\begin{description} |