Select one: The interquartile range is 15 years of age, so the middle 50% of the male senior citizens sampled are between 66 and 71 years of age. The third quartile is 81 years of age, so 25% of the male senior citizens sampled are between 81 and 89 years of age. The median is 71 years of age, so half of the male senior citizens sampled are above 71 years of age. The first quartile is 66 years of age, so 75% of the male senior citizens sampled are above 66 years of age