Measurement+scales

Measurement scales using ** keyword association **
 * **"NO" nominal** (//__**no**__// mathematical value)
 * "**Ord**" **ordinal** (//__**ord**__//er/rank)
 * **Interval** (there is //__no "O"__// in interval, so //__**no true zero)**__//
 * **Rati"o" (rat** __//think of scream and **"o"** in mouth **for true zero)**//__