The following two samples were collected as matched pairs: Calculate the test statistic to test if a difference in means is 1.5 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., 0.22