For each of the following statements, indicate if a one- or two-tailed test is most appropriate: ·         Taking aspirin reduces the chance of a heart attack. ·         Quizzing yourself before a...

For each of the following statements, indicate if a one- or two-tailed test is most appropriate:

·         Taking aspirin reduces the chance of a heart attack.

·         Quizzing yourself before a test will increase your test score compared with simply rereading your notes.

·         Completing a puzzle under a time constraint will affect your accuracy.

·         Sleep affects depression.