hi. I need help please

bepack, a 473 MAT 133: 15 WS 2 p.2 2. Explain the difference between Sampling Bias and Sampling Error. 3. Circle TRUE or FALSE after each statement. Explain why, if it is FALSE. a) Increasing the sample size tends to reduce all sampling bias. b) Random sampling is a good way to reduce response bias 4. A cluster sample was conducted to assess the mortality rates in Iraq before and after Operation Iraqi Freedom in 2003. A total of 33 locations were selected and from each location, all of the closest households were surveyed to determine the total number of household members who died in the 15 months prior to the invasion compared to the 18 months after the invasion. The authors were later sharply criticized for two main reasons Firstly, given the violent and sporadic nature of many of these deaths due to the military conflict, one cluster per 739,000 individuals was deemed insufficient. Secondly, due to the nature of the causes of death, households may be inclined to include deceased extended family members in their counts, even if they would not otherwise have resided together. (Source 1 and Source 2) a) Explain why this is an observational study and not a designed experiment b) What is the likely explanatory variable? c) What is the likely response variable? d) Describe the flaw that is due to sampling method e) Describe the flaw that is due to the survey itself