IMAGE section3119.gif
IMAGE section3120.gif
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is modelis tested,and eitheracceptedor rejected

e “model”: You are just getting samplesfroma populationthat is normally

tributed

B >

Random1000 C1

BC >

Normal50

10

B >

NameC1

‘Parent’

B >

HistoC1

togramof PARENT

N = 1000

IMAGE section3124.gif
IMAGE section3125.gif
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(Cont’d)

h

*

represents 40obs

point

Count

0
5
0
5
0
5
0
5
0
5
0
5
0
5
0
5
0

1
5
27
112
255
662
1166
1809
1981
1770
1189
636
267
92
19
7
2

*
*
*
***
*******
****************
*****************************
**********************************************
**************************************************
*********************************************
*****************************
****************
*******
*
*
*
*

B > DESC

C1

N
1000
Min

Mean
49.931
Max

Median
49.911
Q1

TRMean
49.938
Q3

StDev
9.957

SeMean
0.100

ent

w,to pull three samples from this population which has mean = 50, sigma = 10:

B >Name C2‘Subgp1’
B >Name C3‘Subgp2’
B >Name C4‘Subgp3’
B >Random25C2 - C4
BC >Normal5010
B >Desc C2 -C4

N
25
25
25

Mean
49.48
49.35
51.90

Median
52.36
48.43
54.08

TRMean
49.77
49.68
52.09

StDev
10.36
13.18
9.86

SeMean
2.07
2.64
1.97

gp1
gp2
gp3

Min
26.40
15.90
31.21

Max
65.95
75.24
68.36

Q1
41.13
40.21
46.22

Q3
57.49
59.78
58.78

gp1
gp2
gp3

te that the means are close, but not exactly the same.

te also thatthe StDevs are close, but not exactly the same.

re are two ways to estimate what the parent population looks like.
ctually is a normal distn,with mean = 50 and S = 10, but we aren’t supposed to know that yet).

[made with GoClick]

1