STAT 200 Lecture Notes - Lecture 2: Unimodality
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Stat 200 lecture #2 quantitative variables. Variables are characteristics with values that may vary between subjects. Knowing whether a variable is quantitative or categorical helps us decide how to represent the data. Quantitative variables are measured with a numerical value. Include stems that have no values if there"s a stem greater than it with values: helps us detect anomalies and know how spread out the data is. Is like a rotated histogram that shows the subdivisions" values to an extent* * only if histogram bins are split the same way as the stem/leaf plot. Box plots: shows measures of center and measures of spread. Measures of center: mean and median: mean: the average of the observations, median: the middle number (or avg of the middle 2 numbers) in an ordered data set, conventionally, ordered as in smallest quantity to largest quantity.
