(Population and Sample. For the following studies, de-scribe the population, sample, population parameters, and sample statistics.)

1. A Gallup poll of 1051 American adults shows that 32% of Americans say they have been spending less in recent months and 27% say they are saving more now and intend to make this their new, normal pattern in the years ahead.

2..Representative Sample? You want to determine the typical dietary habits of students at a college. Which of the follow-ing would make the best sample, and why? Also explain why each of the other choices would not make a good sample for this study.

Students in a single dormitory

Students majoring in public health

Students who participate in intercollegiate sports

Students enrolled in a required mathematics class

3.. INSTRUCTIONS: .Determine whether the following studies are observational studies or experiments. If the study is an experiment, identify the control and treatment groups, and discuss whether single-or double-blinding is necessary. If the study is observational, state whether it is a case-control study, and if so, identify the cases and controls

QUESTION---- A National Cancer Institute study of 716 melanoma patients and 1014 cancer-free patients matched by age, sex, and race found that those having a single large mole had twice the risk of melanoma. Having 10 or more moles was associated with a 12 times greater risk of melanoma (Journal of the American Medical Association).