An elongated member is formed with a groove extending in a longitudinal direction thereof. A linear combination of the order statistic is calculated to determine the confidence of that particular classifier, both in general and for that particular sample. By rotating the angle adjusting member relative to the mount member, the anchoring member as well as the sunshade can be adjusted to a desired height. In a preferred embodiment, the bodily fluid is collected via a collection end of the device, a series of pressure heads inside the cap of the collection device forces the sample, as the collection end of the device passes through the pressure heads, into the core of an immunoassay system containing diagnostic strips for illegal drug detection. The insulating layer includes an organic or inorganic insulating material. The method uses magnetic pulse welding, wherein the balancing mass, at a high speed, is radially moved towards the longitudinal axis of the rotational member and, when hitting the rotational member, becomes welded thereto.