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User Guide

6.1.2
- 6.2
- 6.1

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confidence

The confidence analytic returns the confidence interval for a population mean by using a normal distribution.

Syntax

confidence(alpha,standard_dev,size)

The following table describes the required and optional arguments:

Argument	Required Optional	Description
alpha	Required	The significance level used to compute the confidence level. The confidence level equals 100*(1 - alpha)%. It means an alpha of 0.05 indicates a 95 percent confidence level. The alpha is of real number type with value less than or equal to 1.
standard_dev	Required	The population standard deviation for the data range and is assumed to be known. This is of real number type.
size	Required	The sample size. Integer type.

The following table provides the datatype for the parameters you can pass:

Parameter Input Options	Datatype
Event property	Real number for alpha and standard_dev. Size is of integer type.

Example

when 1 stocktopic s with confidence(s.alpha,s.standard_dev,s.size) as result >10 then response with body=" ${result}”

The following table describes the result for the event property value that you pass:

Event Property Value	Description	Result
s.alpha =0.06 s.standard_dev=45.7 s.size=65	s.alpha and s.standard_dev are decimal numbers. s.size is an integer number.	>10

Error Condition

The analytic does not run when there is a type mismatch, that is, when the values contain nonnumeric data. On type mismatch, the analytic returns an error, stops the rule evaluation, and writes the mismatch error to the log file.

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Table of Contents

User Guide

User Guide

confidence

confidence

Syntax

Error Condition