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33 Cards in this Set
- Front
- Back
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data
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observations that have been collected
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statistics
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collection of methods for planning studies, obtaining data, organizing, summarizing, presenting, analyzing, interpreting
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population
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complete collection of elements
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census
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collection of data from every single member of the population
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sample
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subcollection of members selected from the population
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parameter
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numerical measurement describing a characteristic of a population
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statistic
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numerical measurement describing some characteristic of a sample
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quantitative data
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numbers representing measurements or counts
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qualitative or categorical data
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non numerical measurements
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discrete data
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countable number
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continuous data
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infinite values, i.e decimals
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ratio level of measurement
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a zero starting point
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center
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a representative or average value that indicates where the middle of the data set is located
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variation
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a measure of the amount that the data values vary among themselves
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distribution
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nature or shape of the distribution of the data
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outliers
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sample values that lie very far away from the vast majority of the other sample values
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frequency table
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lists data values along with their corresponding frequencies
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frequency
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number of values that fall into that particular class
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lower class limits
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smallest numbers that can belong to the different classes
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upper class limits
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largest numbers that can belong to the different classes
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class boundaries
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are numbers used to separate but without the gaps created by class limits
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class midpoints
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values in the middle of the classes
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class width
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difference between two consecutive lower class limits or two consecutive lower class boundaries
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relative frequency
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change into percents
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histogram
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bar graph
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horizontal on histogram
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class boundaries
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vertical on histogram
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use class frequencies
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measure of center
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value of the center or middle of a data set
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arithmetic mean
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adding values and dividing the total by the number of values
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x with a bar above it
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mean of a sample
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the muu
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mean of a population
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median
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middle value when data values are arranged in order
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midrange
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minimum and maximum divided by two
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