Information for Questions 4: A dataset containing the resting heart rates (beats per minute) of a group of 30 marathon runners is given in the table below.

47	60	66	75	58	73
62	51	60	58	70	68
62	80	52	64	69	62
65	57	74	54	63	82
56	66	72	68	55	67

Based on this sample data, estimate the proportion of marathon runners who have resting heart rates less than 60 beats per minute. Note: Answers are rounded to hundredths.