Which of the following should not be included in the description of an experimental design a)procedure b)problem statement c)materials d) type of data collected

b)problem statement

Design is where the procedure, variables, materials and type of data is being elucidated.

Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation 
2. Hypothesis 
3. Experimentation 
4. Interpretation of data 
5. Evaluating the data 
6. Passing and recording the data 

The answer is option b and c.