Probability Sampling - Simple Random Sampling

Question

Answer 1

Each element has a known and equal probability of selection, and is drawn at random independently of all other elements
Example: A hospital has 1000 patient records. How can one randomly select 100 records to review?

--> You assign numbers from 1 to 1000 to each record and randomly select 100 numbers from 1 to 100 (without replacement).
--> You need a random number generator. For example, SPSS or Excel can do that

Some things to keep in mind about random sampling:

It can be difficult to construct a list that will permit a random sample to be drawn
Time-consuming and costly data collection
Although samples drawn will represent the population well on average, a given random sampling may grossly misrepresent the target population

Feldtrenner
Texttrenner

Feldtrenner
Texttrenner