Answer:
(a) The **valid** truth of inductive inference depends on observation and experiment.
(b) Observation is finding a fact and experiment is **testing hypotheses or theories**.
(c) The difference between observation and experiment is **the active manipulation of variables in an experiment, whereas observation involves passive perception**.
(d) Observation **precedes** experiment.
(e) The scope of pure observation is **wider** than that of experiment.
