Statistics exams are less about arithmetic and more about choosing the right method. Prepare for that.
Start by making a one-page decision chart: what kind of data you have, how many groups you are comparing and which test fits. Practise using it on old exam questions until you no longer need to look.
Next, practise reading output. Most exams give you a table from SPSS or R and ask what it means. Take a few examples and write one sentence of interpretation for each, including the p-value and what it says about the null hypothesis.
Finally, learn your formula sheet before exam day. Know what each symbol means so you are not decoding it in the exam hall.
If one topic keeps tripping you, a single session with a tutor can clear it faster than another weekend of rereading.
