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Sir factors to be considered before deciding whether to investigate variance or not such as size of variance, cost benefit analysis, historical pattern, reliablity of data, are these covered in lectures?
It is pointless keep asking me whether something is covered or not in the lectures, and I am not going to answer any more questions like this.
I have told you so many times, that the lectures cover more than enough to pass the exam well.
Watch the lectures, or, if that is not acceptable to you, then use a Study Text instead (or pay to attend a course and you will find they cover exactly the same things as I do in my lectures!).
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