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ERIC Number: ED065506
Record Type: RIE
Publication Date: 1970-Jun-5
Pages: 21
Abstractor: N/A
Reference Count: 0
Item-Examinee Sampling Procedures and Associated Standard Errors in Estimating Test Parameters.
Shoemaker, David M.
Selected parameters for a negatively-skewed and a normally distributed normative distribution were estimated in a post-mortem item-examinee sampling investigation. Manipulated systematically were number of subtests, number of items per subtest, and number of examinees responding to each subtest. Each item-examinee sampling procedure was replicated five times. Defining one observation as the score received by one examinee on one item, the results indicate that the mean of a normative distribution is easily and efficiently estimated with a relatively small number of observations; the variance, to the contrary is a more difficult parameter to approximate and requires a larger number of observations to obtain a reasonable efficient estimate. The results of this investigation support the conclusion that, in estimating parameters by item-examinee sampling, the variable of importance is not the item-examinee sampling procedure but is instead the number of observations obtained by that procedure. (Author)
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: Office of Education (DHEW), Washington, DC.
Authoring Institution: Southwest Regional Educational Lab., Inglewood, CA.