Fundamental of Biostatistics Notes PDF

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STAT
  Introduction to BiostatisticsLecture NotesIntroduction
Statisticsand Biostatistics
The
eld ofstatistics Thestudyand useoftheory andmethodsfor the analysisofdataarisingfromrandomprocessesorphenomena Thestudy ofhowwemakesenseofdata
Theeld ofstatisticsprovides someofthe mostfundamental...

Description

Another bell-shaped distribution for Y, say

0.1

0.2

Frequency density of y

0.2 0.1 0.0

Frequency density of x

0.3

0.3

0.4

A bell-shaped distribution for X, say

-2

0 x=value of X

2

-2

0 y=value of Y

2

Probability density 0.0

0.005

0.010

0.015

0.020

0.025

100 150 Weight (lbs) 200 250

0.2 0.1 0.0

f(x)=the p.d.f. of x

0.3

0.4

A normal probability density with mean 0 and variance=1

-4

-2

0 x

2

4

0.4

Normal probability densities with different means and variances

0.2 0.1 0.0

f(x)

0.3

mean=0,var=1 mean=0,var=4 mean=4,var=1

-5

0

5 x

10

0.15

Height p.d.f.s for men and women

0.0

0.05

f(height)

0.10

Women Men

55

60

65

70 height

75

80...