Chapter 4, Problem 7PT

To determine

To find: The design of sampling that would provide the information that station needs.

Answer to Problem 7PT

Simple stratified sample.

Explanation of Solution

Given:

The population of three cities are 170,000, 70,000 and 5000 each.

Station doubts that viewing habits differ in larger and smaller are and in the rural too.

Stratified random samples can be defined as the samples collected using simple random sampling from different strata in a heterogeneous population.

Here, to collect the required information the sampling method stratified random sample should be used because sample from each area should be selected and then all the selected cities should be equally shown in the chosen sample

Hence, the correct option is (d).