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Sam's Club announced Tuesday the return of its sampling and demo program, Taste & Tips. The program will officially re-launching this week at all Sam’s Clubs in the United States.
Zhushan Li, Power and Sample Size Calculations for Logistic Regression Tests for Differential Item Functioning, Journal of Educational Measurement, Vol. 51, No. 4 (Winter 2014), pp. 441-462 ...
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