The following two samples were collected as matched pairs:

Pair	1	2	3	4	5	6	7
sample 1	8	4	6.9	9.3	9	7	4.8
sample 2	8.0	2.9	6	6	1	8	9.1

Calculate the test statistic to test if a difference in means is 5 between the populations represented by Samples 1 and 2.

Use Excel to calculate d and Sd. In Excel, enter the data in columns: i.e., sample 1 in one column and sample 2 in another column.

Round your answer to two decimal places, and include the zero and the MINUS sign before the decimal place if needed. E.g.,0.12