Question

2. In response to nutrition concerns raised last year about food served in school cafeterias, the Smallville School District entered into a one-year contract with the Healthy Alternative Meals (HAM) company. Under this contract, the company plans and prepares meals for all elementary, middle, and high school students, with a focus on good nutrition (there are 2500 total students in the district). The school administration would like to survey the students in the district to estimate the proportion of students who are satisfied with the food under this contract. a) Is this an observational study or an experiment? Explain your reasoning. b) Describe a simple random sampling procedure that the administrators could use to select 200 students from the 2,500 students in the district. c) If a stratified random sampling procedure is used, give one example of an effective variable on which to stratify in this survey. Explain your reasoning. d) The School District proceeded with the study by randomly selecting students for the survey. The results showed that 147 out of 200 students were satisfied with the food under this contract. Would it be appropriate to infer that these results adequately reflect the population? Provide an explanation for your response.

          2. In response to nutrition concerns raised last year about food served in school cafeterias, the Smallville School District entered into a one-year contract with the Healthy Alternative Meals (HAM) company. Under this contract, the company plans and prepares meals for all elementary, middle, and high school students, with a focus on good nutrition (there are 2500 total students in the district). The school administration would like to survey the students in the district to estimate the proportion of students who are satisfied with the food under this contract.

a) Is this an observational study or an experiment? Explain your reasoning.

b) Describe a simple random sampling procedure that the administrators could use to select 200 students from the 2,500 students in the district.

c) If a stratified random sampling procedure is used, give one example of an effective variable on which to stratify in this survey. Explain your reasoning.

d) The School District proceeded with the study by randomly selecting students for the survey. The results showed that 147 out of 200 students were satisfied with the food under this contract. Would it be appropriate to infer that these results adequately reflect the population? Provide an explanation for your response.

2. In response to nutrition concerns raised last year about food served in school cafeterias, the Smallville School District entered into a one-year contract with the Healthy Alternative Meals (HAM) company. Under this contract, the company plans and prepares meals for all elementary, middle, and high school students, with a focus on good nutrition (there are 2500 total students in the district). The school administration would like to survey the students in the district to estimate the proportion of students who are satisfied with the food under this contract.

a) Is this an observational study or an experiment? Explain your reasoning.

b) Describe a simple random sampling procedure that the administrators could use to select 200 students from the 2,500 students in the district.

c) If a stratified random sampling procedure is used, give one example of an effective variable on which to stratify in this survey. Explain your reasoning.

d) The School District proceeded with the study by randomly selecting students for the survey. The results showed that 147 out of 200 students were satisfied with the food under this contract. Would it be appropriate to infer that these results adequately reflect the population? Provide an explanation for your response.

Added by Brian W.

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