There are 15 students who will be taking up the test, the researcher sets the level of significance to 0.05.

The following are the scores of the nine students: 10, 11, 12, 12, 13, 13, 13, 15, 16, 17, 17, 17, 18, 18, 18 6.

What will be the t-value of the given problem?
a. 1.752 b. 1.341 c. 1.761 d. 1.345​