Chapter 6, Section 4-D, Exercise 180

Use the formula to find the standard error of the distribution of differences in sample means, x1-x2

.

Samples of size 120

from Population 1

with mean 86

and standard deviation 14

and samples of size 85

from Population 2

with mean 73

and standard deviation 16

Round your answer for the standard error to two decimal places.

standard error =

Enter your answer in accordance to the question statement

the absolute tolerance is +/-0.01