A quality inspector tested 33 copiers in an attempt to estimate ...

[stephzh]

A quality inspector tested 33 copiers in an attempt to estimate the average failure rate of the copier model. His study indicated that the number of failures decreased from two years ago, indicating an increase in the reliability of the copiers. Describe the variable of interest to the inspector.
 
  What will be an ideal response?

Question 2

Parking at a university has become a problem. University administrators are interested in determining the average time it takes a student to find a parking spot. An administrator inconspicuously followed 110 students and recorded how long it took each of them to find a parking spot. Identify the population, sample, and variable of interest to the administrators.
 
  What will be an ideal response?

[Tabitha_2016]

Answer to Question 1

The variable of interest to the researcher is the failure rate of the copiers.

Answer to Question 2

The population of interest are all students at the university who park. The sample is the parking times of the 110 students that were collected by the university administrator. The variable of interest to the administrators is the parking time variable.

[stephzh]

Thanks for the timely response, appreciate it

[abro1885]

Gracias!