R Markdown

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

When you click the Knit button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:

presample<-c(31.6, 32.1, 31.9, 31.7, 32.2, 31.8, 32.0, 31.5, 31.9, 31.7)
sd(presample)
## [1] 0.2221111
power.t.test(n = NULL, delta = 0.1, sd = .2221111, sig.level = 0.05,power = 0.85,type = c("one.sample"), alternative = c("two.sided"))
## 
##      One-sample t test power calculation 
## 
##               n = 46.25363
##           delta = 0.1
##              sd = 0.2221111
##       sig.level = 0.05
##           power = 0.85
##     alternative = two.sided

Including Plots

You can also embed plots, for example:

samples<-c(31.6, 32.1, 31.9, 31.7, 32.2, 31.8, 32.0, 31.5, 31.9, 31.7,32.1, 32.0, 32.1, 32.3, 31.9, 31.9, 32.3, 32.2, 31.9, 32.1,31.9, 31.9, 32.1, 31.6, 31.6, 31.9, 31.8, 32.1, 31.8, 31.7,32.3, 32.0, 32.0, 31.7, 31.9, 32.0, 31.7, 32.1, 31.9, 31.9,31.9, 32.4, 32.0, 31.8, 32.2, 31.7, 31.9)


t.test((samples),mu=32)
## 
##  One Sample t-test
## 
## data:  (samples)
## t = -2.1047, df = 46, p-value = 0.04081
## alternative hypothesis: true mean is not equal to 32
## 95 percent confidence interval:
##  31.87512 31.99722
## sample estimates:
## mean of x 
##  31.93617
dat<-rnorm(40,10,2)
dat
##  [1]  7.882557 11.980205  6.344021  7.935011  9.735058 10.276558 11.067262
##  [8]  9.115714  8.584399  7.553454  7.277340 11.403191 10.321407 14.220923
## [15] 13.256671 11.310303  8.671719 10.339496  7.967800 14.960663  7.481953
## [22] 12.908511  9.927465  9.864810 11.137998 11.326314 11.013120 10.067421
## [29]  4.630641 12.684088 12.539859  5.752024  7.388837  7.391841  9.460243
## [36]  7.865620 10.638261 11.479858  8.901737 11.930468
hist(dat,main="histogram of collected data",col="gold")

Note that the echo = FALSE parameter was added to the code chunk to prevent printing of the R code that generated the plot.