Stats Flashcards
(4 cards)
1
Q
What is an outlier and how to calculate?
A
An outlier is an extreme value which lies outside the overall pattern of data
2
Q
How to calculate outliers?
A
Outliers if
Value is greater than UQ+1.5IQR OR
Smaller than LQ-1.5IQR
Method 2
Value greater than mean plus 2SD
Or less than mean minus 2SD
3
Q
What is positive skew and negative skew and how to calculate
A
Skew is the shape of the data
If Median-LQ<UQ-median(POSITIVE SKEW)
if
Median-LQ>UQ-median(Negative skew)
4
Q
How to calculate standard deviation?
A
Square root[Sum of (x-mean)² divided by n]
