Statistical Analysis
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What Is Significance Testing?
The purpose of performing a significance test can vary, but the most common purpose is to identify differences between subgroups or subgroup’s results compar...
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How to Test Differences Between Series?
In addition, to the option to run a significance test between data points in the same series in a chart or table, you can also run significance tests between...
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How to Hide a Previous Data Point, but Showing the Significant Difference?
A setting option allows you to hide the comparison data points when doing a significance test. The image below shows an example: the result of the latest mon...
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How to Visualize Significant Differences with Icons?
The significance test results in the table object is indicated with symbols such as +/- or ↑/↓. You can also visualize the significance test result with icon...
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How to Visualize Significant Differences with Colored Cell Background?
The significance test results in the table object can be displayed with colored cell backgrounds instead of icons or symbols such as +/-. The image below sho...
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How to Visualize Significant Differences with Colored Values?
The significance test results in the table object can be shown with colored values rather than icons or symbols such as +/-. The image below shows an example...
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How to Visualize Significant Differences with Symbols?
By default two sets of symbols for significance test visualization are available. You can select between +/- and ↓/↑ to indicate if a value is significant or...
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How to Define a Starting Character/Letter for Showing Statistical Differences in Columns?
When running significance tests, you can define a starting letter/character for your comparisons (the characters are used to indicate to which value another ...
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What Is a Norm/Population Test?
In addition to Two independent sample Z-test a significance test formula, Norm/Population test is available in Forsta Visualizations.The “Norm/population tes...
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How to Test a Mean Value Against a Norm/Population Value?
The following input values are used in the formula:p= norm valuex= tested mean valuen= base size* of XSE = Standard error* of XS= Standard deviation* of XFor...
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How to Test a Percentage Share Value Against a Norm/Population Value?
The following input values are used in the formula:p = norm value x= test value (a % value) n= base size* of x q=100-pNote: The base size is weighted if the ...
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How Is a Significance Test with an Effective Base Calculated?
The Effective base = the squared sum of weights divided by the sum of squared weightsFormula for Two independent sample Z test – ProportionsThis is the formu...
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How to Set up Significance Testing in Forsta Visualizations?
To set up a significance test in the StoryTeller, you can go to the Statistical Analysis tab in Analysis. Here you will be able to enable Significance tests ...
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How Is a Z-test Being Calculated in Forsta Visualizations?
Forsta Visualizations supports a Z-test, a T-Test and a norm/population test. Below you can find all details regarding the Z-Test.Forsta Visualizations uses ...
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How Is a T-test Being Calculated in Forsta Visualizations?
Forsta Visualizations supports a Z-test, a T-Test and a norm/population test. Below you can find all details regarding the T-Test. A T-test can be applie...
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How Is a Norm/Population Significance Test Being Calculated?
Forsta Visualizations supports a Z-test, a T-Test and a norm/population test. Below you can find all details regarding the norm/population Test.Norm/Populati...
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Paired Z and T Significance Tests
As a paired significance test includes the respondents that exists in both samples only the most common use cases are for example ad and product testing when...