Practice quiz: Types of research

4 questions. Pick an answer to see if it is right. You can try as many times as you like. These are for practice: the final test has different questions.

1. 1.You want to know why first-year students stop attending a coding club. Which approach fits best?

   A randomised experimentInterviews with students who stopped (qualitative)A benchmark comparisonA simulation
2. 2.What makes a randomised controlled experiment strong for showing cause?

   It always has a large sampleRandom assignment makes the groups alike on average in everything except the treatmentIt uses qualitative dataThe subjects choose their own group
3. 3.Students who chose to use a study app got higher marks. What is the main risk in concluding the app caused it?

   Confounders such as motivationToo much qualitative dataThe app was freeThe study was randomised
4. 4.For an observational result, which wording is most honest?

   X causes YX proves YX is associated with YX always leads to Y