Question 2
If you build an expression manually, as opposed to using a function (e.g., specify (V1+V2)/2 instead of MEAN(V1,V2)), which statement is true?
If any of the variables used in the expression has a missing value, it will be ignored and the expression will proceed to evaluate with variables that have valid values.
It will always return a valid value for each case, regardless of whether one or more of the source variable values are missing.
If any of the variables used in the expression has a missing value, the result for that case is a system-missing value.
If any of the variables used in the expression has a missing value, you will get a notification pointing this out before you proceed.
Correct answer: C