Representing Data (Leaving Cert Mathematics): Flashcards
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Symmetrical distribution definition
Symmetrical distribution definition
Distribution with line of symmetry; both sides match perfectly
Mean, median, mode in symmetrical distribution
Mean, median, mode in symmetrical distribution
Most important type of symmetrical distribution
Most important type of symmetrical distribution
Normal distribution
Positive skew definition
Positive skew definition
Most data at lower values, tail extends to the right
Mean, median, mode in positive skew
Mean, median, mode in positive skew
Tail direction in positive skew
Tail direction in positive skew
Right (positive direction)
Example of positive skew distribution
Example of positive skew distribution
Income distribution in most countries
Negative skew definition
Negative skew definition
Most data at higher values, tail extends to the left
Mean, median, mode in negative skew
Mean, median, mode in negative skew
Tail direction in negative skew
Tail direction in negative skew
Left (negative direction)
Example of negative skew distribution
Example of negative skew distribution
Exam scores when most students perform well
Which measure is pulled by the skew?
Which measure is pulled by the skew?
The mean is pulled in direction of the skew
The tail rule for skew
The tail rule for skew
Skew is named after the direction the tail points
Example of symmetrical distribution data
Example of symmetrical distribution data
Heights of people in a large random sample