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    It is equivalent to performing the split half methodology on all combinations of questions and is applicable when each question is either right or wrong. A high value indicates reliability, while too high a value (in excess of .real-statistics.png" alt="Kuder Richardson formulas" width="329" height="135" />

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    Example 1: A questionnaire with 11 questions is administered to 12 students.real-statistics.

    We can calculate ρKR20 as described in Figure 2.png" alt="Kuder-Richardson formula 20" width="193" height="45" />

    where

    k = number of questions

    pj = number of people in the sample who answered question j correctly

    qj = number of people in the sample who didn’t answer question j correctly

    σ2 = variance of the total scores of all the people taking the test = VARP(R1) where R1 = array containing the total scores of all the people taking the test. Determine the reliability of the questionnaire using Kuder and Richardson Formula 20.

    Values range from 0 to 1.com/wp-content/uploads/2012/12/kuder-richardson-excel. The values of q in row 19 are the percentage of students who answered that question incorrectly – e. The values of pq are simply the product of the p and q values, with the sum given in cell M20.real-statistics. The test statistic is

    Kuder Richardson Excel

    Figure 1 – Kuder and Richardson Formula 20 for Example 1

The values of p in row 18 are the percentage of students who answered that question correctly – e. A correct question scores 1 and an incorrect question scores 0.g. The results are listed in the upper portion of Figure 1. the formula in cell B18 is =B16/COUNT(B4:B15).


The Kuder and Richardson Formula 20 test checks the internal consistency of measurements with dichotomous choices
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ارسال شده در تاریخ پنجشنبه 3 تير 1395 [ گزارش پست ]

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