I thought CT1 was self contained (as far as the other actuarial exams go) for example the Institute allows candidates to sit CT1 without full registration (which is required to sit CT3). In practice what actual knowledge from CT3 is required? Thanks
It's the material in Chapter 15 that relates to statistics. You need to be able to calculate expectations, variances, and be able to deal with the normal distribution and its probabilities. You will either have this knowledge from your earlier mathematical studies, or learn it in CT3 or a textbook. We have added an appendix of useful statistical results to Chapter 15, which should help.
