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 size105

from Population1

with mean87

and standard deviation13

and samples of size70

from Population2

with mean79

and standard deviation17

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

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