Dr. X wants to determine the oral health status and use of s…

Dr. X wants to determine the oral health status and use of smokeless tobacco  among patients attending the General Dentistry Division at Eastman Dental. Dr. X    decides to include all patients attending the clinic on all Tuesdays from January 1st  to March 31st 2001. The sampling method used is:

Researchers were conducting a research study to determine th…

Researchers were conducting a research study to determine the clinical  attachment loss in a sample of adult smokers. The examiner who was  conducting these measurements left the University in the middle of the study.    The Principal Investigator (PI) appointed a new examiner to conduct the  remaining portion of the examinations. To assure consistency in the examinations the new examiner should be: