ch 7 - tables

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    CHAPTER7 - TABLES

    KEYCONCEPTS

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    OUTLINES

    Pivot TableWhat it is ? Pivot Table Field List

    The Pearson Chi-Square Statistic

    Validity of the Chi-Square Test with Small Frequencies

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    PIVOTTABLEWHATITIS?

    A pivot table is a great reporting tool that sorts and sumsindependent of the original data layout in the

    spreadsheet

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    CREATINGPIVOTTABLE

    Choose any cell in this table and choose Pivot Tablewizard in the Data menu

    Excel asks for the data source and suggests this table

    Click OK

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    CREATINGPIVOTTABLE(CONT...)

    You can define the Destinationof Pivot Table as New Sheet or

    Existing Sheet

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    PIVOTTABLEFIELDLIST

    Report Filter

    Column Labels

    Row Labels

    Values

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    PIVOTTABLEFILEDLISTDEFINITIONS

    Report Filter Use a report filter to conveniently display a subset of data

    in a PivotTable report or Pivot Chart Report

    Helps to manage the display of large amounts of data, and

    to focus on a subset of data the report

    Column Labels

    A field that is assigned a column orientation in a PivotTable

    report

    Row Labels

    A field that is assigned a row orientation in a Pivot Table

    report

    Value

    Use to display summary numeric data

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    THEPEARSONCHI-SQUARESTATISTIC

    Karl Pearson devised such a test statistic ~ Pearson chi-square

    It used to calculate a single test statistic

    It will summarize the amount of difference between two

    tables

    If the frequencies all agreed with their expected values ~

    this total (Pearson chi-square) would be 0 If there is a substantial difference between the observed

    and expected counts ~ this value will be large

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    OTHERTABLESTATISTICS

    A common mistake is to use the value of X2

    Used to measure the degree of association between the

    two categorical variables

    A measure of association gives a value to the

    association between the row and column variables It is not dependent on the sample size or the size of the

    table

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    VALIDITYOFTHECHI-SQUARETEST

    WITHSMALLFREQUENCIES

    It might not be valid to use the Pearson chi-square teston a table with a large number of sparse cells

    A spares cell ~ a cell in which the expected count is less

    than 5

    Note: The Pearson chi-square test requires large samples

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    TABLESWITHORDINALVARIABLES

    The Pearson chi-square test makes no assumptionabout the ordering of the categories in the table

    For ordinal variables, there are more powerful test than

    the Pearson chi square

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    REVIEWQUESTIONS

    1. Jelaskan fungsi dari PivotTable?2. Bagaimanakah cara membuat PivotTable agar berada

    di dalam sheet yang telah tersedia?

    3. Sebutkan fields yang disediakan oleh PivotTable, dan

    jelaskan fungsi masing-masing fieldstersebut?4. Di bawah ini adalah fungsi dari Pearson chi-square

    a) Used to calculate a single test statistic

    b) Summarize the amount of difference between two tables

    c) Helps to manage the display of large amounts of data,and to focus on a subset of data the report

    d) Use to display summary numeric data