sampling Flashcards

1
Q

Population definition

A

the whole set of items/objects in interest

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2
Q

Sample defintion

A

a finite subset of a population

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3
Q

Random Sample definition

A
  1. every object in the population has an equal chance of being selected to be part of the sample
  2. the selection of one object is independent to the selection of every other objects
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4
Q

Unbiased Estimate definition

A

the mean of all the observed values, derived from all possible samples

*a statistical tool that produces an estimate of a population parameter that is on average correct, without systematic errors

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5
Q

Why is data summarised?

A

ensures ease of calculation by keeping values small as all the values of x range around ‘a’

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