An introductory statistics instructor wants to know if the median number of hours that students talk on the phone per week is more than 15. He randomly sampled 20 students, asked them to record the number of hours they talked on the phone in one week, and obtained the following data:

Do the data indicate that the median number of hours that students talk on the phone per week is more than 15? Use the α = 0.05 level of significance.