function dmeanpw( N, x, strideX ) {
	return ndarray( N, x, strideX, stride2offset( N, strideX ) );
}
Computes the arithmetic mean of a double-precision floating-point strided array using pairwise summation.

@param {PositiveInteger} N - number of indexed elements
@param {Float64Array} x - input array
@param {integer} strideX - stride length
@returns {number} arithmetic mean

@example
var Float64Array = require( '@stdlib/array/float64' );

var x = new Float64Array( [ 1.0, -2.0, 2.0 ] );

var v = dmeanpw( x.length, x, 1 );
// returns ~0.3333