Question

10例男性矽肺患者的血红蛋白均数为12.59（g/dl）,标准差为1.63（g/dl）,已知男性健康成人的血红蛋白正常值

Answer 1

t.test(rnorm(10,14.2,0),rnorm(10,12.59,1.63))

t.test(rnorm(10,12.59,1.63),mu=14.2)

One Sample t-test

data:rnorm(10,12.59,1.63)

t = -3.5399,df = 9,p-value = 0.006316

alternative hypothesis:true mean is not equal to 14.2

95 percent confidence interval:

12.32984 13.78816

sample estimates:

mean of x

13.059