How can I use Z-scores to detect outliers in my data?

How can I use Z-scores to detect outliers in my data?

Z-scores help identify outliers by measuring how far a data point is from the mean in terms of standard deviations.

What is a typical Z-score threshold for identifying outliers?

A common threshold is a Z-score of 3 or -3, meaning the data point is more than 3 standard deviations from the mean.

Can you show me an example of calculating a Z-score?

Sure! If your data point is 10, the mean is 8, and the standard deviation is 1, the Z-score is (10-8)/1 = 2.

What should I do if I find outliers in my data?

You can investigate the outliers further, remove them if they're errors, or analyze them separately if they're valid.