Question

Sealing your teeth- Many children have their molars sealed to help prevent cavities. In an experiment, $120$children aged$6–8$were randomly assigned to a control group, a group in which sealant was applied and reapplied periodically for $36$months, and a group in which fluoride varnish was applied and reapplied periodically for $42$months. After $9$years, the percent of initially healthy molars with cavities was calculated for each group. Identify the experimental units and the treatments.

Short answer

The experimental units is fluoridation of water , number of dental cavities and diet and the treatments are to randomize it , control it directly and pair-match .

Step-by-step solution

Given information

We need to find that the experimental units and the treatments .

Explanation

The experimental units and factors in this would be fluoridation of water , number of dental cavities and diet.

Here in this case according to experimental design we are given that After$9$years, the percent of initially healthy molars with cavities was calculated for each group.

The treatment would be to randomize it , control it directly and pair-match .