When Magda decided to buy a new computer, she considered all the brands she could recall seeing advertised. This represents Magda's set.

The belmont principle of beneficence requires that: a. subjects derive individual benefit from study participation.b. potential benefits justify the risks of harm.c. the study makes a significant contribution to generalizable knowledge.d. risks are managed so that they are no > minimal.

Population parameters are difficult to calculate due to

People are willing to pay more for a diamond than for a bottle of water because