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If the sample is not representative of the population, then the characteristics
of the sample are not the characteristics of the population.
Example:
If I want to estimate the percentage of the population that are men, and my
sample is the school's football team, my estimate would be that 100% of the
population is comprised of men. What went wrong with my survey ? Simple.
The football team is not a representative sample of the population, at least
not as regards gender.
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Why is it important for a sample to be representative?
It is important for a sample to be representative, so that the whole population's view is counted, and not biased by one particular group within the population.
Why is it important to have a representative sample when doing surveys?
Because without representative sample, your results will not be valid.
Why is important that a sample be random and representative when conducting hypothesis testing?
It helps you nawser
What is a representative sample?
A sample that accurately reflects the characteristics of the population as a whole
How can you determine whether a sample is representative of a population?
Take a simple random sample.
