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IMAGE imgs/section_3_pgmkr_601.gif
IMAGE imgs/section_3_pgmkr_602.gif IMAGE imgs/section_3_pgmkr_605.gif IMAGE imgs/section_3_pgmkr_606.gif

SIGNIFICANCE

TESTFORCOMPARING

TWOPROPORTIONS

P
1 P
2

P

T

N1 N2

=

=

=

=

=

Proportion bad in group 1

Proportion bad in group 2

Proportion bad overall :

Total tested in group 1

Total tested in group 2

HO:

P

1

=

P

2

Total bad

[!]

IMAGE imgs/section_3_pgmkr_6261.gif

H

A:

P

1

P

2

IMAGE imgs/section_3_pgmkr_6258.gif

Total tested

IMAGE imgs/section_3_pgmkr_6262.gif

Z

=

[!]

[!]

Requirement :

Total bad

5, total good

5

IMAGE imgs/section_3_pgmkr_604.gif

(Use Z table for alpha risk)

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