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By A.K. Kurtz, S.T. Mayo. Pretest of Mathematical Essentials for Statistics. The Standard Deviation. Normal Probability Curve. Statistical Inference. Percentiles and Percentile Ranks. Regression Equations.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.