We want to know if students who drank coffee before an exam performed differently on the exam than those who drank water. We matched participants based on their current grades in the class. Our participants' scores are presented below:

Sample 1: drank coffee: 88, 71, 92, 98, 80, 67, 81

Sample 2: drank water: 89, 95, 66, 73, 85, 70, 61

Use Excel to answer the following questions:

1. What is t_obt? Show your work

1. Can we reject the null hypothesis?