Please produce an accurate research design model that dipict

Please produce an accurate research design model that dipicts a Pre-test/Post-test study where 200 participants were randomly assigned to one of four treatment groups.

Solution

There are four treatment groups and 200 participants available

Hence divide 200 into 4 equal groups.

Give each group of 50, one of the four treatments.

Before treatment find the weight and other health particulars about all.

After the treatment again find them.

Prepare a table for four different groups separately

Find mean, variance, std error for each group using df = 50-1 49

The difference is recorded for each group

Then for each group difference is calculated for average std deviation.