Describe the differences between a two-tailed and one-tailed t-test.

Tom, having just returned from Japan, is asked at the beginning of the local Rotary Club meeting to give a short presentation on his trip. His method of presentation will most likely be

a. manuscript. b. memorized. c. impromptu. d. extemporaneous.

A speech that is delivered when extremely careful wording is required is called

a. impromptu. b. memorized. c. manuscript. d. extemporaneous.