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US Birth Data (1994-2003)

US birth data from 1994 to 2003, as provided by the Center for Disease Control and Prevention's National Center for Health Statistics.

Installation

npm install @stdlib/datasets-cdc-nchs-us-births-1994-2003

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
• To use as a general utility for the command line, install the corresponding CLI package globally.

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var dataset = require( '@stdlib/datasets-cdc-nchs-us-births-1994-2003' );

dataset()

Returns US birth data from 1994 to 2003, as provided by the Center for Disease Control and Prevention's National Center for Health Statistics.

var data = dataset();
// returns [ {...}, ... ]

Each element in the returned database has the following fields:

• year: year.
• month: month, where January is denoted by 1.
• date_of_month: day number of the month.
• day_of_week: day of week, where Monday is 1 and Sunday is 7.
• births: number of births.

Examples

var incrmean = require( '@stdlib/stats-incr-mean' );
var dataset = require( '@stdlib/datasets-cdc-nchs-us-births-1994-2003' );

function mean( a, b ) {
    return ( a + b ) / 2.0;
}

function reldiff( a, b ) {
    return 100.0 * ( (a-b)/a );
}

/*
* GOAL: determine whether people avoid giving birth on the 13th of each month.
*
* NOTE: for a more thorough analysis, we'd account for holidays.
*/

// Retrieve the data:
var data = dataset();

// Initialize arrays for storing births for particular day numbers:
var d6or20 = [ [], [], [], [], [], [], [] ];
var d13 = [ [], [], [], [], [], [], [] ];

// Extract the day number data...
var d;
var w;
var i;
for ( i = 0; i < data.length; i++ ) {
    d = data[ i ].date_of_month;
    w = data[ i ].day_of_week;
    if ( d === 6 ) {
        // Average of days 6 and 20 for the same month:
        d6or20[ w-1 ].push( mean( data[ i ].births, data[ i+14 ].births ) );
    } else if ( d === 13 ) {
        d13[ w-1 ].push( data[ i ].births );
    }
}

// Initialize accumulators for computing the average relative difference...
var means = [];
for ( i = 0; i < 7; i++ ) {
    means.push( incrmean() );
}

// Compute the average relative difference between days 6/20 with day 13...
var l1;
var l2;
var mu;
var j;
for ( i = 0; i < 7; i++ ) {
    l1 = d13[ i ];
    l2 = d6or20[ i ];
    mu = means[ i ];
    for ( j = 0; j < l1.length; j++ ) {
        mu( reldiff( l1[ j ], l2[ j ] ) );
    }
}

// Print the results...
for ( i = 0; i < 7; i++ ) {
    console.log( '%d: %d%', i+1, means[ i ]().toFixed( 3 ) );
}

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CLI

Installation

To use as a general utility, install the CLI package globally

npm install -g @stdlib/datasets-cdc-nchs-us-births-1994-2003-cli

Usage

Usage: cdc-nchs-us-births-1994-2003 [options]

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.

Notes

• Data is written to stdout as comma-separated values (CSV), where the first line is a header line.

Examples

$ cdc-nchs-us-births-1994-2003

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References

• Bialik, Carl. 2016. "Some People Are Too Superstitious To Have A Baby On Friday The 13th." https://fivethirtyeight.com/features/some-people-are-too-superstitious-to-have-a-baby-on-friday-the-13th/.

License

The data files (databases) are licensed under an Open Data Commons Public Domain Dedication & License 1.0 and their contents are licensed under Creative Commons Zero v1.0 Universal. The software is licensed under Apache License, Version 2.0.

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See Also

• @stdlib/datasets-cdc-nchs-us-births-1969-1988: US birth data from 1969 to 1988, as provided by the Center for Disease Control and Prevention's National Center for Health Statistics.
• @stdlib/datasets-ssa-us-births-2000-2014: US birth data from 2000 to 2014, as provided by the Social Security Administration.

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Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

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Copyright

Copyright © 2016-2024. The Stdlib Authors.