a health and fitness company is testing a newly designed exercise and weight loss program. it is suspected that the new program is more effective in assisting weight loss. a group of 220 volunteers is first separated into 6 groups, labeled a to f, based upon age and weight such that these qualities are similar within each group. the age and weight of the volunteer is initially measured. within each group, participants are randomly assigned to either undergo the new exercise program or undergo a conventional exercise program. in addition, the daily calorie intake is set to a particular amount, either low, moderate or high, and maintained at that level for the duration of the program. at the end of six months, the percentage of weight lost is measured for each unit and the results are collected and compared.

A randomized block design is a research study in which the experimental units are organized into groups known as blocks.
The treatments are assigned at random to the experimental groups within each block.
We have a completely randomized block design when all treatments appear at least once in each block.
A vaccine trial to check the efficacy of a new vaccine is an instance of block randomization.
There are two treatments in this trial scenario: a placebo and a drug.
A placebo is a non-therapeutic drug that is given to a doctor in place of the real drug.

So, the given situation of a health and fitness company in the testing procedure is an example of a randomized block design experiment.

Therefore, this testing procedure is an example of a randomized block design experiment.

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The correct question is given below:
A health and fitness company is testing a newly designed exercise and weight loss program. It is suspected that the new program is more effective in assisting weight loss. A group of 220 volunteers is first separated into 6 groups, labeled A to F, based upon age and weight such that these qualities are similar within each group. The age and weight of the volunteer is initially measured. Within each group, participants are randomly assigned to either undergo the new exercise program or undergo a conventional exercise program. In addition, the daily calorie intake is set to a particular amount, either low, moderate or high, and maintained at that level for the duration of the program. At the end of six months, the percentage of weight lost is measured for each unit and the results are collected and compared.

This testing procedure is an example of a ____.