A group of students collected data on the number of hours they study each week and their scores on a recent mathematics exam. The data showed the following correlation:

Hours Studied: {0, 1, 2, 3, 4, 5, 6}

Scores Achieved: {50, 55, 60, 65, 70, 75, 80}

Given this data, if a student studies for 4 hours, what is the probability that their score will be greater than 70?