MAT 152 1.3 – Flashcards
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Random Sampling
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Process using chance to select individuals from a population to be included in a sample.
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If convenience is used to obtain a sample the results of the survey are ____.
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Bias
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Simple Random Sampling
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Sample of size "n" from a population of size "N" is obtained through SRS if EVERY possible sample of size "n" has an equal chance of occurring.
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Sample of size is "_"
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n
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Population of size "_"
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N
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Random Number Table
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Assign a number to all individuals in a population. Can use the calculator for this
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What does it mean when sampling is done without replacement?
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The individual is removed from the possible choices for that sample and cannot be chosen again.
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Maytag wants to administer a satisfaction survey to its current customers. Using their customer database, the company randomly selects 5050 customers and asks them about their level of satisfaction with the company.
What type of sampling is used?
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Simple Random
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A salesperson obtained a systematic sample of size 20 from a list of 500 clients. To do so, he randomly selected a number from 1 to 25, obtaining the number 17. He included in the sample the 17th client on the list and every 25th client thereafter. List the numbers that correspond to the 20 clients selected.
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17, 42, ..., 492
