Standard Deviation

• There’s a slight difference between standard deviation and pooled sample standard error:

  • When we are talking about a population, we talk about standard deviations.
  • When we talk about a sample we call it a standard error.

• Population Standard Deviation

• Sample Standard Deviation

Reference:

• Standard Deviation: Simple Definition, Step by Step Video
• Pooled Standard Deviation - Statistics How To
• Standard Deviation: Simple Definition, Step by Step Video