Categorical variables are also known as qualitative (or discrete) variables. These categorical variables can be further classified as being nominal, dichotomous or ordinal variables. Each of these types of categorical variable (i.e., nominal, dichotomous and ordinal) has what are known as categories or levels. These categories or levels are the descriptions that you give a variable that help to explain how variables should be measured, manipulated and/or controlled.
BetimolÂ® (timolol ophthalmic solution), 0.25% and 0.5%, is a non-selective beta-adrenergic antagonist for ophthalmic use. The chemical name of the active ingredient is (S)-1-[(1,1-dimethylethyl)amino]-3-[(4-(4-morpholinyl)-1,2,5-thiadiazol-3-yl]oxy]-2-propanol. Timolol hemihydrate is the levo isomer.
The origin and meaning of the name Bettina is inherited by all variant forms. Other forms of Bettina include the Dutch, English, and Japanese diminutive form Ina, the English and Scandinavian diminutive form Tina, and the English, German, and Italian variant spelling Betina.n addition, Bettina is a diminutive form of the Italian Benedetta and a derivative (Italian) of the English and German Benedicta. Bettina is also a derivative (English, Italian, and Spanish) of the Dutch and English Betty.