Multiple Choice
When a significant number of subjects drop out of a study,there is a(n) ____ threat.
A) history
B) mortality
C) instrumentation
D) regression
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q43: Issues of cause and effect are closely
Q44: If there is random assignment,a research study
Q45: Experimental designs use _ assignment.
Q46: When taking the pretest affects how participants
Q47: Any factor that leads to differences between
Q49: List and discuss the three criteria for
Q50: Random assignment and random selection are the
Q51: A group comparable in every way possible
Q52: Figure TB 8-8<br> <span class="ql-formula"
Q53: If there is not random assignment,but there