Normal distribution a Introduction to normal distribution ■ History ■ Parameters and shape standard normal distribution and z score ■ Area under the curve 日 Application Estimate of frequency distribution Reference interval (range)in health related field.4 Normal distribution  Introduction to normal distribution ◼ History ◼ Parameters and shape ◼ standard normal distribution and Z score ◼ Area under the curve  Application ◼ Estimate of frequency distribution ◼ Reference interval (range) in health_related field