Determine whether the given value is a statistic or a parameter.

1. A sample of 120 employees of a company is selected, and the mean age is found to be 37 years.

2. Ford Motor Company weighs every Mazda CX-9 that comes off the line, and records the mean weight of the model.

Identify the data as either continuous or discrete.

3. The masses of antique coins are found to be 5.0 g, 5.2 g, and 4.9 g.

4. The prices of candy bars are $0.75, $0.90, and $1.10.

Determine which of the four levels of measurement is most appropriate. (problems 5 - 7)

5. Dates (like 1980) in the 20^th century when major hurricanes occurred.

6. Safe combinations.

7. Difficulty rating of a class on a scale of 1 to 10, with 10 meaning "very difficult."

8. Convert 0.02 to an equivalent fraction and percentage.

9. On a 2005 Gallup poll, it was reported that 25% of adult Americans believe

in astrology. This is clearly a rounded figure, since 1002 adults participated in the survey. About how many of those adults believe in astrology?

Is the description an observational study or an experiment?

10. A Big Burger restaurant manager purposely leaves the cheese off half of

the burgers sold, to see if customers notice.

11. A Big Burger restaurant manager examines sales records to find trends.

Identify the type of observational study: Cross-sectional, Retrospective, Prospective

12. A cohort of kindergarteners is chosen, to be tracked over the next 10 years to see how they respond to new math teaching techniques.

Identify which type of sampling is used: Convenience, Cluster, Systematic, Stratified

13. A certain Big Burger restaurant makes 500 Big Burgers and 200 Fish Sandwiches daily. 11 Burgers and 7 fish sandwiches are selected for quality tests.

14. To estimate mean daily sales at Michigan Big Burger restaurants, Wayne County is selected and every location in the county is used in the study.

15. The bills for the 15^th, 30^th, 45^th, and 60^th drive-thru transactions are collected.