Consider the four key questions that guide the choice of an inference method. Two of these questions are
Q: Question type. Estimation or hypothesis testing?
S: Study type. Sample data or experiment data?
What are the other two questions that make up the four key questions? For each of the studies described in Exercises 7.22 to 7.24, answer the following key questions:

Question Ty pe study Type Type of Data Number of Samples Estimation or hypothesis testing? Sample data or experiment data? One variable or two? Categorical or numerical? How many samples or treatments? or Treatments