Question

Sampling and parameters

Video Assessment Questions

1. In the video, the student sampled 50 M&M’s at a time. What effect would it have had if she had only sampled 20? What about 100 or 200?

2. In real studies, do the data ever get eaten?


3. What would have happened if, instead of counting the number of brown M&M’s, the student had weighed them?

4. Why did Van Halen insist on having no brown M&Ms?

Answer 1

1.If she had only sampled 20, the standard error of the mean will be larger. Likewise, if the sample size is increased to 100 or 200, the standard of error will be lesser.

2.Yes, it can get eaten sometimes known as “lost to follow up”. We usually get missing data in these condition.

3.It is still okay that instead of counting the number of brown M&Ms, if the student had weighed them. This is because for the both continuous and binary variable, the confidence intervals would apply equally.

4.They just want to know if the concert organizer read the band’s contract or not.