Related Questions: Hypothesis Testing

An analyst collects the following data related to paired observations for Sample A and Sample B. Assume that both samples are drawn from normally distributed populations and that the population variances are not known.

|Paired Observation|Sample A Value|Sample B Value|

|1| 25 18
|2| 12 9
|3| −5 −8
|4| 6 3
|5| −8 1

The t-statistic to test the hypothesis that the mean difference is equal to zero is closest to:

Question: can i use ba ii plus to calculate sample variance or standard error on this one?