Epstein compared "feelings of fear and anxiety" of experienced parachutists (more than 100 jumps) to those of novices (fewer than 10 jumps)

Statistics Nov 06, 2020

Epstein compared "feelings of fear and anxiety" of experienced parachutists (more than 100 jumps) to those of novices (fewer than 10 jumps). Feelings were measured on a questionnaire with scores from 1 (calm) to 10 (very nervous). The subjects were all men in their 20s. Identify:
a.      the dependent variable
b.      the independent variable, and the names of the levels
c.      a controlled extraneous variable
d.      a quantitative variable
e.      a categorical variable