1.2. Basic statistical concepts
1.2. Basic statistical concepts Population A population is the entire group of individuals, objects, or events that we are interested in studying. It is often too difficult or expensive to study an entire population, so we usually select a sample from the population. For example, let's say we are interested in studying the average height of all women in India. The population in this case would be all women in India. Examples: All registered voters in India All iPhone users in the world All students enrolled in a university Sample A sample is a subset of the population that we observe and collect data from. In the previous example, it would be impossible to measure the height of every single woman in India, so we would instead measure the height of a sample of women. For instance, we could measure the height of 1,000 randomly selected women from across India and use that information to make inferences about the population. Then we can say 1,000 is the sample siz...
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