1. If you are told only that you scored in the 80th percentile, do you know from that description exactly how it was calculated? Explain.
2. For the numbers 1, 2, 4, 16, compute the following:
ΣX
ΣX^2
(ΣX)^2
ADHD Treatment (AT) case study
3. (AT) What is the independent variable of this experiment? How many levels does it have?
4. (AT) What is the dependent variable? On what scale (nominal, ordinal, interval, ratio) was it measured?