Sample size calculation

Question 1

What is the importance of sample size calculation

Answer 1

1. Ensure study validity and reliability
2. Ensure efficient resource use
3. Avoid waste of finances, time and effort
4. For statistical power of the study
5. Increases confidence in the results and makes them more likely to be accepted in the scientific community
6. Study results to be more generalisable

Question 2

Define margin of error

Answer 2

The maximum allowable difference between the sample estimate and the true population parameter

Question 3

What is inclusion criteria

Answer 3

It is the criteria for including participants in the study

Question 4

What is exclusion criteria

Answer 4

It is the criteria for excluding patients from the study, to prevent biases