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#quantitative-methods-basic-concepts #statistics
A population consists of an entire set of objects, observations, or scores that have something in common. It comprises every possible member of the specified group. In our example above, the population of tennis balls consists of every tennis ball that has ever been manufactured anywhere in the world. This is a huge number of tennis balls. Another example of a population would be all males between the ages of 15 and 18.

A sample is a subset of a population. The sample is comprised of some of the members of the population. Since it is usually impractical (or too expensive or time-consuming) to test every member of a population, using data gathered from a sample of the population is typically the best approach available for describing that population.


In our example above, a sample might be a selection of 1,000 tennis balls of various makes collected from different sources. It would be a virtually impossible task to collect every possible tennis ball in the world; this same size provides a manageable number to work with as well as a substantial amount of possible data.

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Subject 1. The Nature of Statistics
all over the world. Clearly, this is not practical; aside from taking up lots of time, it would be cost-prohibitive to purchase all the balls we would need for our study. A more practical solution would be to use a sample. <span>A population consists of an entire set of objects, observations, or scores that have something in common. It comprises every possible member of the specified group. In our example above, the population of tennis balls consists of every tennis ball that has ever been manufactured anywhere in the world. This is a huge number of tennis balls. Another example of a population would be all males between the ages of 15 and 18. A sample is a subset of a population. The sample is comprised of some of the members of the population. Since it is usually impractical (or too expensive or time-consuming) to test every member of a population, using data gathered from a sample of the population is typically the best approach available for describing that population. In our example above, a sample might be a selection of 1,000 tennis balls of various makes collected from different sources. It would be a virtually impossible task to collect every poss


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