func NewStatistics() *Statistics {
	return &Statistics{
		Mean:   math.NaN(),
		StdDev: math.NaN(),
	}
}
NewStatistics creates a new zero-valued Statistics instance
package reckon
import "math"
const (
	MaxExampleKeys = 10
	MaxExampleElements = 10
	MaxExampleValues = 10
)
type Statistics struct {
	Mean   float64
	Min    int
	Max    int
	StdDev float64
}