hw 5 r command history
DESCRIPTION
R commandsTRANSCRIPT
1.
> data = c(7.7,6.8,8.0,7.4,7.2,7.3,8.3,7.7,7.6,7.0)> qqnorm(data)> summary(data) Min. 1st Qu. Median Mean 3rd Qu. Max. 6.800 7.225 7.500 7.500 7.700 8.300 > sd(data)[1] 0.4546061
3.
data = c(0.14, 0.32, 1.17, 1.45, 3.5, 5.02, 5.09, 5.22)
> boxplot(data)> boxplot(data, horizontal=TRUE)> hist(data)> hist(data, main = "Hisogram of Soil Specimens")> t.test(data,mu=4)
> bootest <- function(data,nboot) {+ data.m <- mean(data)+ data.s <- sd(data)+ data.n <- length(data)+ foo <- function(x) {+ d <- sample(data, replace = TRUE)+ (mean(d) - data.m)/sd(d)*sqrt(data.n)+ }+ return(sapply(1:nboot, foo))+ }> data.boot = bootest(data,8000)> hist(data.boot)> data.boot > abos(t.obs)Error: could not find function "abos"> data.boot > abs(t.obs)
> sum(data.boot > abs(t.obs))[1] 559> sum(data.boot > abs(t.obs))/8000[1] 0.069875> sum(data.boot > abs(t.obs))/8000 + sum(data.boot < -abs(t.obs))/8000[1] 0.1425> qqnorm(data)