sampling Flashcards
1
Q
Population definition
A
the whole set of items/objects in interest
2
Q
Sample defintion
A
a finite subset of a population
3
Q
Random Sample definition
A
- every object in the population has an equal chance of being selected to be part of the sample
- the selection of one object is independent to the selection of every other objects
4
Q
Unbiased Estimate definition
A
the mean of all the observed values, derived from all possible samples
*provides accurate approximations of the population parameters
5
Q
Why is data summarised?
A
ensures ease of calculation by keeping values small as all the values of x range around ‘a’
