Assume that we using a very nonpolar stationary phase in GC we can guess that elution times Butanol, II. Isopropanol, III. Ethanol.(Hint:polarity of alcohols increases with increasing for the four following analyte species can be ranked in terms of shortest to longest as:I. the number of carbon atoms).

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .