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ULC and LLC
Sai Gowtham Babu AMBURI Gowtham Babu AMBURI updated 2 years ago 4 Members · 5 Posts 
How does this help with understanding the data
Thank you
 This discussion was modified 2 years, 1 month ago by Sai Chaitanya Kumbhari Chaitanya Kumbhari.
 This discussion was modified 2 years, 1 month ago by Satish Vadlamani.

two common ways to identify outliers:
1.Upper control limit (UCL) and lower control limit (LCL), calculated by mean and standard deviation (std) of the sample
UCL = mean + 3 * std
LCL = mean  3 * std
Anything outside of the range can be treated as outliers.
2. Quartiles, calculated by median (instead of mean), and needs to sort the sample
Q1, 25%, the middle number between the smallest number and median
Q2, 50%, the median
Q3, 75%, the middle number between the median and the largest number
IQR(Interquartile range) = Q3Q1
Upper limit = Q3 + 1.5 * IQR
Lower limit = Q1  1.5 * IQR
Anything outside of the limits can be considered outliers

That was really helpful thank you @sindhri
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