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Sample Calculator


4.4 ( 544 ratings )
Obchod Vzdělávání
Vývojář: Bill Nolen
0.99 USD

The Sample Calculator answers one of the most frequently asked questions in statistics: What size sample do I need?

You provide the estimated population variance (standard deviation) and the allowable error band, choose one of two confidence levels (.95 or .99), and the sample size needed is displayed.