Two samples, each with n=5 scores, have a pooled variance of 40. What is the estimated standard error for the sample mean difference

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

answer: 2/4

step-by-step explanation:

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.