How to calculate the t-value of the indirect effect

[teresa750102]

Hi Everybody,

I have one question to calculate the t-value of the indirect effect.

The bootstrap results of my model are in the following.

Original Sample (O) T Statistics (|O/STERR|) Sample Mean (M)
X -> Y 0.13 1.78 0.13
X -> M 0.24 3.09 0.24
M -> Y 0.68 13.47 0.68

Standard Deviation (STDEV) Standard Error (STERR)
X -> Y 0.07 0.07
X -> M 0.08 0.08
M -> Y 0.05 0.05

Based on the formula for the t-test a*b/sd(ai*bi), I know

a*b = 0.24*0.68 = 0.16 in my case.

But I don't know how to calculate the sd(ai*bi).

Does anyone help me explain?

Thank you for you help!!

[nayabeyes]

Hi Everybody,

I have one question to calculate the t-value of the indirect effect.

The bootstrap results of my model are in the following.

Original Sample (O) T Statistics (|O/STERR|) Sample Mean (M)
X -> Y 0.13 1.78 0.13
X -> M 0.24 3.09 0.24
M -> Y 0.68 13.47 0.68

Standard Deviation (STDEV) Standard Error (STERR)
X -> Y 0.07 0.07
X -> M 0.08 0.08
M -> Y 0.05 0.05

Based on the formula for the t-test a*b/sd(ai*bi), I know

a*b = 0.24*0.68 = 0.16 in my case.

But I don't know how to calculate the sd(ai*bi).

Does anyone help me explain?

Thank you for you help!!

Hi,
The bootstrapping sd is equal to the standard error in bootstrapping. Use In the function of STDEV in Microsoft Excel. BR