Héctor Valverde > Statistics-RatioVariance-1.00 > Statistics::RatioVariance

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Module Version: 1.00   Source  

NAME ^

Statistics::RatioVariance - Ratio and associated variance calculation.

SINOPSIS ^

    my %zdNResults = RatioVariance->calc(\@x,\@y,\@x_var,\@y_var);

    foreach my $key (keys %result){
    print "$key = $result{$key}\n";

DESCRIPTION ^

For two vectors of means (X and Y) and its associated sets of variances (V[X] and V[Y]), this function calculates the rate (R) as:

    R = sum(X)/sum(Y)

being sum(X) and sum(Y) the sum of all elements in the set, respectively. Also, it estimates the associated variance for R using Taylor expansion and taking into account the correlation between X and Y.

Furthermore, the function run a Z-Test to evaluate if R shifts from the unit significatively.

VERSION ^

    Version 1.00

FUNCTIONS ^

calc

Launch the complete algorithm.

AUTHOR ^

Hector Valverde, <hvalverde at uma.es>

CONTRIBUTORS ^

Juan Carlos Aledo, <caledo@uma.es>

BUGS ^

Please report any bugs or feature requests to bug-statistics-ratiovariance at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Statistics-RatioVariance. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT ^

You can find documentation for this module with the perldoc command.

    perldoc Statistics::RatioVariance

You can also look for information at:

LICENSE AND COPYRIGHT ^

Copyright 2012 Hector Valverde.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

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