Semesterside for STK2130 - Vår 2022

Solutions to the Exam 2022 can be found here.

Some of you have noticed that characteristics (density, expectation, variance etc.) of the gamma distribution in the formula sheet (section 9c) and in our lectures/exercise classes (see e.g. slide 13/27 of Lecture 14) are different. There is no contradiction: the reason is that in the formula sheet they use a different (but equivalent) parametrization.

If, in the formula sheet, you put

beta = 1/lambda

you will obtain exactly what we had during the lectures. In particular, in the formula sheet parametrization, 

E[X] = alpha*beta,

whereas in the parametrization we used during the lectures (and which is more convenient for our course)

E[X] = alpha/lambda.

As it was already mentioned, there will be 3 problems on the exam (which cover 3 major topics of the course) - the structure of the exam will be approximately the same as the one of the trial exam posted some time ago.

However, if one wants to prepare even better, one can solve the following:

Problem 1:  Problem 1 of Exam 2021, Problems 1 and 2 of Exam 2020, Problem 1 of Exam 2018, Problems 1 and 2 of Exam 2017, Problem 1 of Exam 2016, ...