Question

1) A sample of 17 patients in a hospital had these hemoglobin readings (grams): 112 120 98 55 71 35 99 124 64 150 150 55 100 132 20 70 93 Find a 95% confidence interval for the hemoglobin reading for all the patients in the hospital. 2) A sample of 500 nursing applications included 60 from men. Find the 90% confidence interval for the true proportion of men who applied to the nursing program. 3) Average undergraduate cost for tuition, fees, room, and board for all institutions last year was $19,410. A random sample of costs this year for 40 institutions of higher learning indicated that the sample mean was $22,098, and the sample standard deviation was $6050. At the α=0.01, is there sufficient evidence to conclude that the cost of attendance has increased?

Answer 1

ans

112 120 98 55 71 35 99 124 64

150 150 55 100 132 20 70 93

Find a 95% confidence interval for the hemoglobin reading for all the patients in the hospital.

2) A sample of 500 nursing applications included 60 from men. Find the 90% confidence interval for the true proportion of men who applied to the nursing program.

3) Average undergraduate cost for tuition, fees, room, and board for all institutions last year was $19,410. A random sample of costs this year for 40sorry