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آمار پزشکی به زبان آدمیزاد. جلسه سوم توزیع نرمال. دکتر فرنوش داودی متخصص پزشکی اجتماعی گروه پزشکی اجتماعی، دانشگاه علوم پزشکی ایران. You are going to learn about. Normal distribution Central limit theorem. Mean Median Mod. The Normal Distribution. f(X). SD. X. mean.
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آمار پزشکی به زبان آدمیزاد جلسه سوم توزیع نرمال دکتر فرنوش داودی متخصص پزشکی اجتماعی گروه پزشکی اجتماعی، دانشگاه علوم پزشکی ایران
You are going to learn about • Normal distribution • Central limit theorem
Mean Median Mod
The Normal Distribution f(X) SD X mean
68% of the data 95% of the data 99.7% of the data
?? % are higher than 163.4 cm ?? % are higher than 170.1 cm ?? % are higher than 176.8 cm ?? % are higher than 183.5 cm ?? % are higher than 156.7cm ?? % are shorter than 150 cm * * * Mean = 163.4 cm SD= 6.7 cm * * *
Mean= 0 SD= 1
Skew Mod< Median <Mean Mod> Median >Mean
Characteristics of Normal distribution? • Bell shaped • Symmetric • Mean= Median=Mod • 68-95-99 rule!
The medical statistics final exam scores • General practitioners' income
Distribution of birth weight of newborns in hospital “X” • There are some very low birth weight infants. OR • There are some large for gestational age infants.