Dental anxiety study. Refer to the BMC Oral Health

(Vol. 9, 2009) study of adults who completed the Dental Anxiety Scale, presented in Exercise 5.37

(p. 279). Recall that scores range from 0 (no anxiety) to 25 (extreme anxiety).

Summary statistics for the scores of 15 adults who completed the questionnaire are x = 10.7 and s = 3.6.

Conduct a test of hypothesis to determine whether the mean Dental Anxiety Scale score for the population of college students differs from m = 11. Use a = .05.