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11 Cards in this Set
- Front
- Back
probability
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probability is used to predict what kind of samples are likely to be obtained from a population.
the probability of any particular outcome, when different outcomes are possible, is defined as a fraction or a proportion of all the possible outcomes. |
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random sample
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random sampling requires that each individual in a population has an equal chance of being selected, and that the probabilities must stay constant from one selection to the next if more than one individual is selected
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binomial distribution
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shows the probability associated with each value of X from X=0 to X=n
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under what circumstances is the normal distribution an accurate approximation to the binomial distribution?
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when the pn and qn are both greater than 10
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random sample
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sample obtained using a process that gives every individual an equal chance of being selected and keeps the probability of being selected constant over a series of selections
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sampling with replacement
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sampling technique that returns the current selection to the population before the next selection is made. this is a required part of random sampling
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normal distribution
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a symmetrical, bell-shaped distribution with proportions corresponding to those listed in the unit normal table
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unit normal table
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a table listing proportions corresponding to each z-score location in a normal distribution
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percentile
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a score that is identified by the percentage of the distribution that falls below its value
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percentile rank
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the percentage of a distribution that falls below a certain score
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binomial distribution
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the distribution of probabilities, for each possible outcome for a series of observations of a dichotomous variable
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