The product quality deviation and you can variety was both methods of spread out-of a document put. For each and every number tells us in own method exactly how spaced-out the knowledge was, because they are one another a way of measuring type. Though there is not an explicit relationships amongst the variety and you will fundamental departure, discover a principle that is certainly useful to connect both of these statistics.

The range signal informs us that standard deviation of a good sample is roughly comparable to you to definitely-fourth of your own range of the details. (más…)