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X X-X (X-X) : - M (N-M) S (N-1)

This document calculates the coefficient of reliability for a test with 45 items. It provides data from 10 dry run respondents, including their total scores, deviations from the mean, and squared deviations. It then uses the Kuder-Richardson formula to determine the coefficient of reliability is 0.99 based on this sample data.

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Joel Mangallay
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78 views1 page

X X-X (X-X) : - M (N-M) S (N-1)

This document calculates the coefficient of reliability for a test with 45 items. It provides data from 10 dry run respondents, including their total scores, deviations from the mean, and squared deviations. It then uses the Kuder-Richardson formula to determine the coefficient of reliability is 0.99 based on this sample data.

Uploaded by

Joel Mangallay
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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31

Coefficient of Reliability

Number of Items: 45

Number of Dry Run Respondents: 10

Equation Used: Kuder-Richardson Instrument Reliability Equation

Respondents x x-x (x-x)


1 .66 -4,47 19.98
2 2.33 0.2 0.04
3 3.66 1.47 2.16
4 2.33 0.2 0.04
5 5 2.83 8.00
6 4.66 .53 0.28
7 4 -0.13 0.02
8 1 -4.13 17.06
9 5.33 1.2 1.44
10 6.33 5.2 17.04
𝑥̅ =24.9 S=2.9 S2=76.1

Mean= 𝑥̅ =24.9

RK-R= Ns2-m (N-m)


S2(N-1)

6.33(2.9)-14.9(6.33-24.9)
76.1(6.33)
=0.99

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