This paper describes a program system which was developed for the purpose of making estimates about the nature of the distribution of test scores which will result from an administration of a test composed of items on which estimates of item-difficulty and discrimination are available. In developing these estimates, the test constructor is free to make assumptions about the nature of the group of examinees and the number of examinees to be tested. It is expected that test developers will find this program system useful in the test development process.
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