# algebra 2 topic test 2 vocabulary Flashcard Daphne Armenta
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random sample

all members of the population are equally likely to be chosen
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normal distribution

has data that vary randomly from the mean
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percentiles

the value below which a percentage of data falls
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measures of variation

describes how the data in a data set are spread out
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sample

a part of a population
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outlier

a number that is very far from the other numbers in the set
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median

the middle number in an ordered set of numbers
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standard deviation

measures showing how much data values deviate from the mean
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margin of error

helps you find the interval in which the mean of the population is likely to be, it’s based on the size of the sample and the confidence level desired
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conditional probability

the probability of an event B in relationship to an event A is the probability that even B occurs given that event A has already occurred
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z score

the number of standard deviations that a value, x, is above or below the mean
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binomial experiment

experiment that has a fixed number of trials, each trial is independent of the others, only two outcomes, and probability of each outcome remains constant from trial to trial
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measures of central tendency

the mean, median, mode, and standard deviation of a set of data
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standard normal curve

a \”bell-shaped\” curve for standard normal distribution
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mean

the sum of the values in the set divided by the number of items in the set
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range of a data set

the difference between the highest and lowest values in the set
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mode