*If ta=1,then TTEST uses the one-tailed distrbution.If ta=2, then TTEST uses the two-tailed distrbution.ty is the type of t-Test. ty value is 1 or 2 or 3. | *If ta=1,then TTEST uses the one-tailed distrbution.If ta=2, then TTEST uses the two-tailed distrbution.ty is the type of t-Test. ty value is 1 or 2 or 3. |