Error in data analysis often occurs because the researcher has chosen an inappropriate sample for study—a sample that does not correctly reflect the characteristics of the population or phenomenon as a whole. Name at least three different causes of sampling error and state why each of them can produce invalid data.

When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.