30. The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.

The article Nutrient Intakes and Dietary Patterns of Older Americans: A National Study (J. Gerontology, 1992: M145—150) reports the following summary data on intake for a sample of males age 65—74 years: n  115, , and s  6.43. Does this data indicate that average daily zinc intake in the population of all males age 65—74 falls below the recommended allowance?