Population & Sampling Flashcards
All 6 cards in this deck
What is a population in statistics?
The whole group that is being studied.
What is a sample?
A smaller part of the population that is selected and studied.
Give one advantage of taking a sample rather than surveying the whole population.
It is quicker and cheaper.
What makes a sample unreliable for drawing conclusions about a population?
Being too small or not representative (biased).
How do you estimate a population total from a sample proportion?
e.g. of sampled are left-handed, population
Multiply the sample proportion by the population size.
True or false? A sample of 10 students from one class can reliably represent all students in a school.
False. The sample is too small and taken from only one class, so it is not representative.