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1. Briefly describe the difference between observational and experimental data.

2. a. Briefly describe how you might design a study to investigate the relationship between smoking and lung cancer.

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b. Is your study in Part a observational or experimental? Explain why.

3. List five important points to consider when designing a questionnaire.

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.

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. recognizes that students often encounter challenging assignments that may be beyond their current skill level or require more time than they can spare due to their busy schedules. The platform steps in to provide valuable academic support by offering assistance with a wide range of assignments. Whether it’s a complex research paper, a challenging math problem set, or a literary analysis, ensures that students receive the guidance they need to excel. Every student is unique, and so are their academic needs. recognizes this and offers customized solutions. Students can communicate directly with their assigned writers, providing specific instructions and guidelines. This personal touch ensures that each assignment reflects the student’s individual style and preferences. Meeting deadlines is a critical aspect of academic success. understands this and prioritizes punctuality. The platform is known for its ability to deliver assignments promptly, even when facing tight schedules. This reliability allows students to submit their work on time, relieving them of the stress associated with late submissions.

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