A two-way ANOVA has _____ factor(s)

What do scientists call a tentative statement about cause-and-effect relations between events?

Three years ago when he couldn't start his car, Bill discovered that his battery had gone dead. By replacing the battery, Bill had solved the problem

This morning Bill went to start his car and again found that it wouldn't start. Noting the similarities with before, Bill went and purchased a new battery for his car. Bill is making use of which problem-solving strategy? a) analogy heuristic b) working backwards c) framing d) means-end analysis