Given two dependent random samples with the following results:

Population 1: 63       62       61       81       55       69       75       53

Population 2: 73       52       63       72       65       72       71       60

Can it be concluded, from this data, that there is a significant difference between the two population means?

Let d=(Population 1 entry)-(Population 2 entry). Use a significance level of α=0.01 for the test. Assume that both populations are normally distributed.

Find the value of the standard deviation of the paired differences. Round your answer to one decimal place.