ATDH - Admission Test for Dental Hygiene Data and Probability Analysis Questions and Answers

Question 1

A dental hygienist measures six periodontal pocket depths around a specific molar, recording the following values in millimeters: 3, 2, 4, 5, 3, 1.
What is the mean (average) pocket depth for this tooth?

Accepted Answer

3 mm

Answer

3.5 mm

Answer

18 mm

Answer

4 mm

Question 2

A study records the number of carious lesions in a group of 8 pediatric patients: 4, 1, 0, 3, 2, 5, 1, 6. What is the median number of carious lesions for this data set?

Accepted Answer

2.5

Answer

2

Answer

3

Answer

2.25

Question 3

A community dental clinic has 200 active patients. A review of their records indicates that 50 of these patients have been diagnosed with gingivitis. If a patient is selected at random, what is the probability that they have gingivitis?

Accepted Answer

1/4

Answer

1/5

Answer

1/3

Answer

1/2

Question 4

A dental hygienist is analyzing the ages of patients who received a specific cosmetic procedure in one week. The ages recorded are: 28, 35, 26, 41, 28, 50, 28, 33. Which of the following values represents the mode of this data set?

Accepted Answer

28

Answer

33.6

Answer

30.5

Answer

24

Question 5

A quality control report measures the fluoride concentration (in parts per million, ppm) in five different batches of city water. The readings are: 0.7 ppm, 1.1 ppm, 0.6 ppm, 0.9 ppm, and 1.2 ppm. What is the range of these fluoride concentrations?

Accepted Answer

0.6 ppm

Answer

0.9 ppm

Answer

1.2 ppm

Answer

0.5 ppm

Question 6

A bar chart displays the results of a patient satisfaction survey for a dental practice. The percentages of 'Very Satisfied' responses for three hygienists are: Hygienist A: 85%, Hygienist B: 90%, Hygienist C: 75%. Which of the following statements accurately interprets the data?

Accepted Answer

Hygienist B has the highest patient satisfaction.

Answer

Hygienist C has the highest patient satisfaction.

Answer

Hygienist A's satisfaction rating is 10 percentage points lower than Hygienist B's.

Answer

The average satisfaction rating for the three hygienists is 85%.

A dental hygienist measures six periodontal pocket depths around a specific molar, recording the following values in millimeters: 3, 2, 4, 5, 3, 1.What is the mean (average) pocket depth for this tooth?

A dental hygienist measures six periodontal pocket depths around a specific molar, recording the following values in millimeters: 3, 2, 4, 5, 3, 1.
What is the mean (average) pocket depth for this tooth?