Distribution Models

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  • 7/31/2019 Distribution Models

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    DISTRIBUTION MODELSA guide for reviewers, data analysts and interpreters onthe statistical properties of common distribution models

    This guidance document is one of a series that outlines important basic statistical concepts and procedures that are usefulthese suggestions be followed where applicable, but is

    open to other techniques provided that these alternatives are technically sound. Before a different methodology is adoptedit should be discussed with BC Environment.

    Soil pH14131211109876543210

    ofSamples

    12

    10

    8

    6

    4

    2

    0

    Percentage

    April 2001

    in contaminated sites studies. BC Environment recommends that

    CONTAMINATED SITES STATISTICAL APPLICATIONS GUIDANCE DOCUMENT NO. 12-4

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    Soil pH13121110987654321

    ofSamples

    1210

    8

    6

    4

    2

    0

    Percentage

    13121110987654321

    ofSamples

    12

    10

    8

    6

    4

    2

    0

    Percentage

    13121110987654321

    ofSamples

    12

    10

    8

    64

    2

    0

    Percentage

    3 st andard deviat ions+

    9 9 %

    2 st andard deviat ions+

    9 5%

    1 st andard deviat ion+

    6 8 %

    5 04 03 02 0100

    ofSamples

    12

    10

    8

    6

    4

    2

    0

    Percentage

    ug/g

    ug/g

    ug/g ug/g

    ug/g

    ug/g.

    ug/g

    As ( in ug/g)

    0 ug/g

    0 ug/g

    ug/g

    0 ug/g

    . 1 2 - 4 :

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    10 8 06 04 0200

    ofSamples

    12

    10

    8

    6

    4

    2

    0

    Percentage

    PCB (in ug/ g)

    ug/g

    ug/g

    ug/g

    ug/g

    ug/g

    ug/g

    1 2 - 4 :

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    ug/g

    ug/g

    ug/g

    ug/g

    ug/g

    ug/g)

    ug/g

    ug/g

    ug/g

    ug/g

    . 1 2 - 4 :