1. Matt, the manager, wants to estimate the mean wait time for customers to check out in his Mini-Market. He randomly selects customers and determines the mean wait time is minutes. Define the following for this exercise:
a) Is the data collected qualitative or quantitative?
b) Variable (x):
c) Population of Interest:
d) Sample:
e) Parameter of Interest and Statistic: Do you expect the parameter and the statistic to be the same value? Explain.
f) Discuss the use of descriptive and inferential statistics in this exercise.
g) Is the variable, x, discrete or continuous?
2. Identify the population and sample for the following examples:
The P.E. coach of a middle school interested in the mean height for the graders in the school. He randomly selects graders and measures the height of each.
a) Population:
b) 7thgraders Sample:
c) A community college notices that an increasing number of full-time students are working while attending school. The administration randomly selects 200 students and determines how many hours per week each student works.
