Which set of measures would give a clear conclusion about the data? 5, 6, 7, 7, 7, 8, 9 (a)range—5 mode—7 median—9 mean—8 (b)range—25 mode—8 median—8 mean—8 outlier—3 (c)range—8 mode—none median—6 mean—9 (d)range—4 mode—7 median—7 mean—7