Question: A researcher wondered whether there was any difference in pulse rates for smokers versus nonsmokers among female college sophomores. Random samples of 15 students each were selected, and the recorded pulse rates for each group were as follows:

Smokers: 64, 68, 92, 94, 68, 72, 80, 99, 90, 64, 76, 78, 80, 78, 82

Nonsmokers: 66, 60, 66, 74, 84, 68, 62, 76, 80, 70, 62, 72, 76, 74, 78

Is there a significant difference between the two groups?