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1.1. Briefly describe the difference between observational and experimental data.2.2. a. Briefly describe how you might design a study to investigate the relationship between smoking and lung cancer. b. Is your study in Part a observational or experimental? Explain why.3.3. List five important points to consider when designing a questionnaire.4.4. a. Describe why the Literary Digest poll of 1936 has become infamous. b. What caused this poll to be so wrong?5. A statistics practitioner would like to conduct a survey to ask people their views on a proposed new shopping mall in their community. According to the latest census, there are 800 households in the community. The statistician has numbered each household (from 1 to 800), and she would like to randomly select 25 of these households to participate in the study. Use Excel to generate the sample.6. The operations manager of a large plant with four departments wants to estimate the person hours lost per month due to accidents. Describe a sampling plan that would be suitable for estimating the plant-wide loss and for comparing departments.6.7. Is it possible for a sample to yield better results than a census? Explain.8. Explain the difference between sampling error and non-sampling error.Record all on word document.

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