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Mind Map Of The Unit (Median (For a continuous probability distribution,…
Mind Map Of The Unit
Median
For a continuous probability distribution, the median is the value such that a number is equally likely to fall above or below it.
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Box plot
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A simple way of representing statistical data on a plot in which a rectangle is drawn to represent the second and third quartiles, usually with a vertical line inside to indicate the median value. The lower and upper quartiles are shown as horizontal lines either side of the rectangle.
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Quantitative data
Quantitative data are measures of values or counts and are expressed as numbers. Example the height of the students in a class.
qualitative data
Data can be qualitative or quantitative. Qualitative data is descriptive information, for example the colour of the hair.
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central tendency
It's a way to describe the center of a data set. There are three measures of central tendency: the mean, the median, and the mode.
Mode
The number which appears most often in a set of numbers. Example: in {6, 3, 9, 6, 6, 5, 9, 3} the Mode is 6.
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Range
The difference between the lowest and highest values. In {4, 6, 9, 3, 7} the lowest value is 3, and the highest is 9, so the range is 9 − 3 = 6.
IQR
The interquartile range, is a measure of statistical dispersion, IQR = Q₃ − Q₁.
percentiles
A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations fall.
population
The whole group from which a sample is taken. A good example could be a tennis match you ask a precise number of people a question and that is the sample but the population is all the people that were at the match.
Sample
A selection taken from a larger group so that you can examine it to find out something about the larger group. Example: you ask 100 randomly chosen people at a football match what their main job is. Your sample is the 100.
raw data
Raw data, also known as primary data, is data collected from a source.
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