Skewness (AQA GCSE Statistics): Flashcards
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10 cards from this deck
What indicates a positively skewed distribution?
What indicates a positively skewed distribution?
Data clusters low, with a long tail to the right.
How to identify positive skew in a box plot?
How to identify positive skew in a box plot?
Median is closer to the lower quartile than upper quartile.
What is the relationship of mean, median, mode in positive skew?
What is the relationship of mean, median, mode in positive skew?
Mean > Median > Mode.
What does a symmetrical distribution look like?
What does a symmetrical distribution look like?
Data is evenly spread, forming a bell-shaped curve.
How to identify negative skew in a box plot?
How to identify negative skew in a box plot?
Median is closer to the upper quartile than lower quartile.
What is the relationship of mean, median, mode in negative skew?
What is the relationship of mean, median, mode in negative skew?
Mode > Median > Mean.
What is the skewness formula?
What is the skewness formula?
Skew = 3(mean - median) / standard deviation.
What does a skewness value of 0 indicate?
What does a skewness value of 0 indicate?
The distribution is perfectly symmetrical.
How to interpret a skewness value of 0.87?
How to interpret a skewness value of 0.87?
Indicates a positive skew, confirming visual analysis.
What does a negative skew value indicate?
What does a negative skew value indicate?
Data is skewed to the left, with a long left tail.