Compute a 95% CI for the mean age?

Refer to the data in Table 2.13. Regard this hospital as typical of Pennsylvania hospitals.

Table 2.13: Hospital-stay data

 

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First Received bacterial culture? Duration First WBC (x 10") following admission Received Sex antibiotic? Service of temp. hospital stay following admission 1 = yes 2 = no ID 1 = yes 1 = med. 2 = surg. 2 = F Age 2 = no no. 99.0 30 2. 10 73 98.0 3 40 99.0 12 4 11 47 98.2 11 25 98.5 14 82 96.8 30 60 99.5 8. 11 56 98.6 7 17 43 98.0 98.0 10 3 50 12 11 59 97.6 97.8 12 3 13 8. 22 99.5 11 2. 14 33 2 98.4 14 98.4 15 5 20 11 32 99.0 16 5 17 36 99.2 18 4 69 98.0 19 97.0 47 20 22 98.2 6. 21 11 98.2 10 98.6 14 22 11 19 97.6 23 11 67 4 24 43 98.6 5 25 4 41 98.0