The number of degrees of freedom for a paired t test, where the data consists of n independently pairs $\left( X _ { 1 } , Y _ { 2 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { m } \right)$ is __________.

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The Answer of The number of degrees of freedom for a paired t test, where the data consists of n independently pairs $\left( X _ { 1 } , Y _ { 2 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { m } \right)$ is __________.

The Number of Degrees of Freedom for a Paired T (X1,Y2),(X2,Y2),……,(Xn,Ym)\left( X _ { 1 } , Y _ { 2 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { m } \right)(X1​,Y2​),(X2​,Y2​),……,(Xn​,Ym​)

The Number of Degrees of Freedom for a Paired T $\left( X _ { 1 } , Y _ { 2 } \right) , \left( X _ { 2 } , Y _ { 2 } \right) , \ldots \ldots , \left( X _ { n } , Y _ { m } \right)$