What does Y bar mean?

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Dileep Vishwakarma

2 years ago

A sample mean is typically denoted ȳ (read "y-bar"). It is calculated from a sample y1, y2, ... , yn of values of Y by the familiar formula ȳ = (y1+ y2+ ... + yn)/n. The population mean µ and a sample mean ȳ are usually not the same. Confusing them is a common mistake.

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