lib/typedarray.js
function random( len, dt, mu, sigma, rand ) {
	/* jshint newcap:false */
	var ctor;
	var out;
	var draw;
	var i;

	draw = partial( mu, sigma, rand );
	ctor = ctors( dt );
	if ( ctor === null ) {
		throw new Error( 'invalid value. Data type does not have a corresponding array constructor. Value: `' + dt + '`.' );
	}
	out = new ctor( len );
	for ( i = 0; i < len; i++ ) {
		out[ i ] = draw();
	}
	return out;
}
function random( len, dt, mu, sigma, rand ) {
	/* jshint newcap:false */
	var ctor;
	var out;
	var draw;
	var i;

	draw = partial( mu, sigma, rand );
	ctor = ctors( dt );
	if ( ctor === null ) {
		throw new Error( 'invalid value. Data type does not have a corresponding array constructor. Value: `' + dt + '`.' );
	}
	out = new ctor( len );
	for ( i = 0; i < len; i++ ) {
		out[ i ] = draw();
	}
	return out;
}
RANDOM // 
FUNCTION: random( len, dt, mu, sigma[, rand] )
Creates a typed array of normally distributed random numbers.

@param {Number} len - array length
@param {String} dt - data type
@param {Number} mu - mean parameter
@param {Number} sigma - standard deviation
@param {Function} [rand=Math.random] - random number generator
@returns {Int8Array|Uint8Array|Uint8ClampedArray|Int16Array|Uint16Array|Int32Array|Uint32Array|Float32Array|Float64Array} typed array filled with normal random numbers