Question R15 Q6 - NSB Round Robin 2009

In which of the following instances would using a student t-test be most appropriate:

W) comparing yes or no answers on a single question on a questionnaire

X) determining statistical differences between 5 different age groups of males that received a drug that increases red blood cell production

Y) finding the statistical differences between two groups in an experiment on a drug's effect in raising or lowering blood pressure

Z) comparing the strengths of 5 different types of fishing lines

Science Bowl Question