The t test for single samples is used when the population parameters µ and s are unknown.

Name: The t test for single samples is used when the population parameters µ and s are unknown.
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The t-test for single samples is used when the population mean (µ) is unknown, but it is typically used when the population standard deviation (σ) is also unknown and thus estimated by the sample standard deviation (s).

The T Test for Single Samples Is Used When the Population