Sometimes researchers use _____ rather than individuals as the ...

[joblessjake]

Sometimes researchers use _____ rather than individuals as the unit of sampling to obtain a random sample from a population. This technique is especially useful if the population contains some very mobile individuals.
 
  a. residential unit c. last known address
  b. birth address d. eighth grade address

Question 2

In order to estimate the ratio of white to black students in his college, a professor determines the proportion of whites and blacks in his class. The students of the entire college are called a _________.
 
  a. sample c. statistic
  b. population d. parameter

[k2629]

Answer to Question 1

A
Using the residential unit ensures that the sample will represent a given community even though the residents may change from time to time.

Answer to Question 2

B

[joblessjake]

Thanks for the timely response, appreciate it

[nguyenhoanhat]

Wow, this really help