Populations and Samples

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1st lesson of Stats Textbook - most important to remember the terms.

10 Terms

1

Population

Whole set of items that are of interest

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2

Census

observes or measures every member of a population

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3

Sample

Selection of observations from a group in a population used to find out information about the population altogether

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4

Ads of a census?

should give a completely accurate result

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5

Disads of a census?

time consuming and expensive

Cannot be used when testing process destroys items

Hard to process large quantities of data

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6

what impact does the size of a sample make on validity of conclusions?

Generally, the larger the sample, the more accurate it is but you need more resources.

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7

What

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8

What tends to be inevitable when coming to a conclusion from samples?

Different samples lead to different conclusions because of natural variations in a population

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9

Sampling units

Individual units of a population

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10

Sampling frame

Numbered or individually named to form it.

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