(AP statistics) Explain how each of the following may add bias or affect the results of a survey or experiment design: a. Hawthorne Effect b. Placebo Effect c. interviewer induced Bias d. Response Bias e Non response Bias 2. Choose one of the terms from question 1c, 1d, or 1e and give a specific way it may alter results of a survey 3. In the early 1900s a dentist in Colorado was investigating the cause of brown spots found on teeth in patients. In his research he observed data that indicated these brown stained teeth had increased levels of fluoride and decreased occurrence of tooth decay and cavities. Is his research sufficient to conclude that fluoride prevents cavities? explain why or why not