The recommended daily dietary allowance for zinc among males older than age 50 years is...

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. of Gerontology, 1992: M145–150) reports the following summary data on intake for a sample of males age 65–74 years: n = 115, = 11.3 , and . Does this data indicate that average daily zinc intake in the population of all males ages 65–74 falls below the recommended allowance?