Standardizing individual data Values on a normal curve The standardized z-score is how far above or below the individual value is compared to the population mean in units of standard deviation How far above or below= data value-mean In units of standard deviation"=divide by o Standardized individual value data value -mean x standard deviation o 2002 The Wadsworth GroupStandardizing Individual Data Values on a Normal Curve • The standardized z-score is how far above or below the individual value is compared to the population mean in units of standard deviation. – “How far above or below”= data value – mean – “In units of standard deviation”= divide by s • Standardized individual value z = data value − mean standard deviation = x ?  s © 2002 The Wadsworth Group