Outliers (AQA GCSE Statistics): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What defines an outlier in a data set?
What defines an outlier in a data set?
An outlier is an extreme value that differs significantly.
How to identify outliers using quartiles?
How to identify outliers using quartiles?
Use and .
What is the IQR if and ?
What is the IQR if and ?
IQR = .
Identify outliers: 0, 1, 2, 3, 20 using quartiles.
Identify outliers: 0, 1, 2, 3, 20 using quartiles.
20 is an outlier; , , IQR=2.
What indicates an outlier in a box plot?
What indicates an outlier in a box plot?
Outliers appear as crosses (×) beyond the whiskers.
What are the outlier boundaries for mean=46, SD=10.8?
What are the outlier boundaries for mean=46, SD=10.8?
Lower: 14.4, Upper: 77.6.
How to determine if 95 is an outlier with mean=46, SD=10.8?
How to determine if 95 is an outlier with mean=46, SD=10.8?
Check if 95 > mean + 2*SD; if yes, it's an outlier.
When to use the quartile method?
When to use the quartile method?
Use it for smaller data sets without distribution assumptions.
What is the standard deviation rule for outliers?
What is the standard deviation rule for outliers?
Values > 3 SDs from the mean are outliers.
Key step in outlier calculations?
Key step in outlier calculations?
Always show your working and state your method.