Respuesta :

bhuvna789456

Estimated standard error for the sample mean difference= 17.93

Step-by-step explanation:

Given data,

   n=5

   variance, σ =40

Standard error = σ / sqrt (n)

                         = 40/ sqrt (5)

                         = 40/2.23

                         =17.93

Estimated standard error for the sample mean difference= 17.93