When the population standard deviation ($\sigma$ )is unknown, the value of s - 1 is used to compute the t value.

Name: When the population standard deviation ($\sigma$ )is unknown, the value of s - 1 is used to compute the t value.
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Quizplus · Accepted Answer

When the population standard deviation is unknown, the sample standard deviation (s) is used directly in the formula for the t value; the term "s - 1" refers to the degrees of freedom (n - 1) where n is the sample size, not a modification of the standard deviation.

When the Population Standard Deviation σ\sigmaσ )Is Unknown, the Value of S - 1 Is Used

When the Population Standard Deviation $\sigma$ )Is Unknown, the Value of S - 1 Is Used