Question about the exam which is tmrw :(

was wondering, in the probability exam will we get more/better marks if we use the formula, Z = x-m / standard deviation? or is ok just to skip straight to the part where we put it into the calculator?
Thanks, Sam :slight_smile:

Hi sam
You donโ€™t need to show any working for questions that give you the mean and standard deviation if you are using a graphics calculator. Some questions will be set up in such a way that you HAVE to use the formula to solve them (eg finding the mean or standard deviation). These are usually merit or excellence questions.

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