the sample standard deviation of the paired differences

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Given two dependent random samples with the following results:

Population 1 35 34 45 30 49 25 34
Population 2 44 24 40 42 38 31 43

Use this data to find the 90% confidence interval for the true difference between the population means. Assume that both populations are normally distributed.

Step 2 of 4 : Calculate the sample standard deviation of the paired differences. Round your answer to six decimal places.

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