Question

In: Statistics and Probability

Determine whether the following should be classified as simple random, systematic, convenience, stratified, or cluster sampling....

Determine whether the following should be classified as simple random, systematic, convenience, stratified, or cluster sampling.

1. Church members are each assigned a number and then a random-number table is used to select the members who will complete the survey

2. Ten students from every 8:00 MWF math class at Tech are selected to complete a survey

3. Every 15th person who enters a local store is selected and asked questions regarding the cleanliness of the store

4. Five students from every dorm on campus are selected

Solutions

Expert Solution

1)

In this situation , each church has equal number of chance to include in sample and sample point selecting using random numbers. So this is example of simple random sampling.

2)

In this situation , math classes are working as clustors and we are selecting sample points from then each clustor .

This is example of clustor sampling.

3)

In systematic sampling we include population units with number n, n+k , n+2k....... In given example we are using such technique to select sample points.

So this is example of systematic sampling .

4) suppose each dorm has equal number of students .

Then in such situation dorms working as groups ( strata) and we are selecting five students from each dorm . So this is an example of stratified sampling.


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