Could I get some help on this worksheet?

1) Married people seem to have better health than their single peers. If a marriage ends, the healthy edge tends to disappear, with divorced or separated people reporting higher rates of illness. This conclusion was based on a nationwide survey conducted by Statistics Canada of 9775 random people, aged 20 to 64, regarding physical and mental health and relationship status, at 2-year intervals beginning in 1990. a) Identify the explanatory variable. (circle the best choice) Married Relationship Divorced or Physical and people status Separated people Mental health b) Describe the response variable. (circle the best choice) Married Relationship Divorced or Physical and people status Separated people Mental health c) Explain why it would be practically impossible to design this study as an experiment. d) Explain why it would not be possible for the Statistics Canada researchers to say that marriage causes better health. Be specific. 2) In July 2005, the Gallup Organization polled 489 adult Americans to estimate the proportion who believe smoking in this country should be made totally illegal. The survey found that 16% of the respondents in the sample thought smoking should be illegal. a) Describe the population for this study. (circle the best choice) All smokers in the US All voters in the US All adult ope All non-smokers Americans b) Describe the sample for this study. (circle the best choice) Smokers in 2005 The 16% who want All adult The 489 adult smoking to be illegal Americans Americans c) Identify the statistic reported for this study. d) Explain why we do not know the exact value of the parameter