Foundation Flashcards
The first step of any statistical analysis you perform is to…
determine if the data I’m dealing with is a population or a sample
Population is denoted as
an uppercase ‘N’
Population numbers are called
parameters
A sample is
a subset of a population
A sample is denoted as
a lowercase ‘n’
Numbers we obtain when dealing with Sample’s are called
statistics
What are the main reasons for drawing a sample instead of analyzing an entire population
- Less time consuming & 2. Less costly (cheaper
You will most always being dealing with Sample or Population data?
Sample data
Sample data has two defining characteristics
- Randomness 2. Representativeness - a sample must be both for it to be precise
What is a random sample
A random sample is collected when each member of the sample is chosen from the population strictly by chance.
What is a representative sample
A representative sample is a subset of the population that accurately reflects the members of the entire population.
How do you draw a sample that is both random and representative?
A. Get access to the student database and contact individuals in a random manner. B.
