I can think of many examples where an enmuration helps in understanding the sentence. However, I am not sure whether it is correct to put a colon before each enumeration. So which of the following sentences is incorrect?
(a) The density function can be estimated using both: (i)... and (ii) ...
(b) The density function can be categorized into two categories: (i)... and (ii) ...
(c) The properties of the density function are: (i)... and (ii) ...
(d) A function is called a density function whenever: (i)... and (ii) ...
(e) A function is called a density function if: (i)... and (ii) ...
Thanks