Answer Problem 8.12 assuming a one-sided test is used with α = .05.

Table 2.13 Hospital-stay data

Nutrition

The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the poverty level is 6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake (mg)] among 40 females, 12 to 14 years of age, above the poverty level is 6.80 ± 0.76.

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First Received First Duration WBC Received bacterial Sex (x 10°) following admission antibiotic? culture? Service of temp. following admission 1 = med. 2 = surg. 1 = M 1 = yes 1 = yes ID hospital stay Age 2 = F 2 = no 2 = no no. 99.0 1 30 2 10 73 2 98.0 5 3 40 99.0 12 2 4 11 47 98.2 2 2 25 2 98.5 11 2 2 2 14 82 96.8 2 99.5 30 60 1 11 56 98.6 43 9. 17 98.0 10 50 98.0 12 2 2 97.6 11 59 2 2 12 4 97.8 3 2 22 11 13 99.5 98.4 14 33 2 14 2 98.4 15 20 2 11 2 2 16 32 99.0 2 2 17 36 99.2 2 2 69 18 4 98.0 6 2 19 47 97.0 5 2 98.2 20 22 1 2 2 2 21 11 98.2 10 22 11 19 98.6 14 2 23 11 67 2 97.6 4 2 2 43 24 2 98.6 2 2 2 25 4 41 2 98.0 LO