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, x = 11.3, and s = 6.43. Does this data indicate that average daily zinc intake in the population of all males ages 65-74 falls below the recommended allowance?

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