DrJohnson Hypothesizes That NutraSweet Reduces Short-Term Memory

Multiple Choice

Dr.Johnson hypothesizes that NutraSweet reduces short-term memory.In order to test her hypothesis she gives 10 subjects a beverage containing NutraSweet (treatment group) and 10 subjects a beverage without NutraSweet (control group) .She then measures the subject's ability to recall a list of numbers.Dr.Johnson's dependent variable is measured using _____scale of measurement.

A) nominal
B) interval
C) ordinal
D) ratio
E) None of these