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Unit 1

Data Displays and Number Systems

TermDefinition
Data Information that is gathered by counting, measuring, questioning, or observing.
Statistics The study of numerical data collecting, organizing, and analyzing data to interpret and answer questions.
Variability How spread out the values in a set of data are.
Statistical question A question that would be answered by collecting or analyzing data.
Range The difference between the maximum and the minimum in a data set. The range is a measure of how spread out a distribution is.
Dot plot a number line long enough to encompass all numbers in a sample, showing a dot over the position corresponding to each number. • if more than one dot falls in the same position, they are stacked up.
Maximum highest or greatest amount or value.
Distribution the distribution of data typically takes into account the range and spread of a data set. • it describes the shape of a data set when displayed on a histogram.
Mode a type of average. • in a set of scores, values or numbers the mode is the one that occurs the most.
Data Landmark A notable feature of a data set. Some landmarks are the mean, median, mode, maximum, minimum, and range.
Minimum lowest or least amount or value.
Median a type of average which is the middle value of an ordered set of data values. 2. a line that joins the vertex of a triangle to the midpoint of the opposite side.
Average A typical value for a set of numbers. The word average usually refers to the mean of a set of numbers.
Mean usually called the average and may be called the arithmetic mean. • the mean is the total of all the scores or amounts, divided by, how many scores or amounts there were.
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