4. The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. In a recent report, a summary data on zinc intake for a sample of male

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4. The recommended daily dietary allowance for zinc among males older than age 50
years is 15 mg/day. In a recent report, a summary data on zinc intake for a sample of male 

subjects age 65~74 years in New York is as follows: n=110, x=13.4, and s=6.3. Does this data
indicate that the average daily zinc intake in the population of all males age 65~74 falls below
the recommended allowance, assuming a significance level of 0.05 for the p-value? [Hint: for
a large n, assume s = 0, and use the standard normal distribution table]
Transcribed Image Text:subjects age 65~74 years in New York is as follows: n=110, x=13.4, and s=6.3. Does this data indicate that the average daily zinc intake in the population of all males age 65~74 falls below the recommended allowance, assuming a significance level of 0.05 for the p-value? [Hint: for a large n, assume s = 0, and use the standard normal distribution table]
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