Which statistical approach is one of the most powerful and yet simple methods for identifying outliers?
A) N-grams
B) Z-score
C) Time-trend analysis
D) Soundex algorithm

Question

Quizplus · Accepted Answer

Z-score is a powerful and simple method for identifying outliers. It is easy to calculate and helps in standardizing the data by measuring the deviation of a value from the mean in units of standard deviation. Any data point with a Z-score greater than 3 or less than -3 is considered an outlier.

Which Statistical Approach Is One of the Most Powerful and Yet