Directions - Please respond to each of the following prompts.

Explain the difference between a parameter and a statistic.

Consider the levels of measurement. Are data at the nominal level of measurement quantitative or qualitative? A national survey asked 1261 U.S. adult fast-food customers which meal (breakfast, lunch, dinner, snack) they ordered. Identify the variable in this scenario. Is the variable quantitative or qualitative? What is the implied population?

Consumer Reports conducted a survey on the average miles per gallons (mpg) for all new hybrid small cars.Their survey used a random sample of such vehicles and found the average to be 35.7 mpg. Identify the variable in this study. Is the variable qualitative or quantitative? What is the implied population?

Categorize the following measurements associated with student life according to level: nominal, ordinal, interval, or ratio: Length of time to finish an exam

Time of first class Major field of study Score on last exam (based on 100 possible points) Age of students Course evaluation scale: Poor, Acceptable, Good

Explain the difference between a stratified sample and a cluster sample

In a random sample of 50 students from a large university, all the students were between 18 and 20 years old. Can we conclude that the entire population of students at the university is between 18 and 20 years old? Explain.

A brief survey regarding opinions about recycling was carefully designed so that the wording of the questions would not influence the responses. Jill administered the survey at a farmer's market.She approached adults and asked if they would fill out the survey, explaining that the results of the survey might be used to set trash collection and recycling policy in the city. She stood by silently while the form was filled out. Jill was wearing a green T-shirt with the slogan "Fight Global Warming." Are the respondents a random sample of the community?Are there any concerns that Jill might have influenced the respondents?

Which technique for gathering data (observational study or experiment) do you think was used in the following studies?

The Colorado Division of Wildlife netted and released 774 fish at Quincy Reservoir.There were 219 perch, 315 blue gill, 83 pike, and 157 rainbow trout. The Colorado Division of Wildlife caught 41 bighorn sheep on Mt. Evans and gave each one an injection to prevent heartworm. A year later, 38 of these sheep did not have heartworm, while the other three did.