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### 25 Cards in this Set

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 quantitative data with mesurements in numbers qualitative data theat can be classified into different groups or categories categorical data that can be classified into different groups or categories univariate data with onely one measurement on each object bivariate data with two measurements on each object n number of observations in data set frequency number of times in a data set the observation occurs f frequency relative frequency ratio of frequency to the total number of observations rf relative frequency equation for relative frequency rf=f/n cumulative frequency number of observations less than or equal to a specified value cf cumulative frequency frequency distribution table table gving all possible values of data and their frequencies. RF, CF, midpoints of group, etc. may be added to frequency distribution tables if needed ungrouped frequency distribution table table where data points are reported as they occurred, giving a list of all values classes wehn categories for data points are grouped by some scheme into certain categories grouped frequency distribution table table where data points are grouped into classes class makrk halfway betwen upper limit and lower limit (midpoint for class) midpoint 1/2 way between upper and lower limit true or false: All RF from one distribution should add up to 1. True center distribution describes the point around which the data points are spread spread of distribution describes how data points are spread, using range of data values and vasteness or narrowness of spread symmetric distribution if 1/2 of distribution is approx. a mirror image of hte other, then the distribution is symmetric. Same # of obserivations on each side of midpoint left skewed disribution longer tail on left. lesser half of distribuiton extends further than the greater half. right skewed greater half of distribution extends fruther out than lesser half. longer tail on right.