Example: One Sample t-Test

January 31, 2012
By

(This article was first published on ALSTAT R Blog, and kindly contributed to R-bloggers)

Using the stack loss dataset, test the hypothesis that the mean of the stackloss is equal to 20 versus a two-sided alternative. 

Solution:

Codes:

Output:

Interpretation: With the p-value greater than the level of significance alpha at 0.05, then we lack the evidence to reject the null hypothesis. And thus, the true mean is equal to 20.

To leave a comment for the author, please follow the link and comment on his blog: ALSTAT R Blog.
R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series,ecdf, trading) and more...

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...

Tags: , ,

Comments are closed.

Top 7 articles of the week

  1. Quandl Package - 5,000,000 free datasets at the tip of your fingers!
  2. Google Analytics + R = FUN!
  3. How R Grows
  4. Writing from R to Excel with xlsx
  5. FasteR! HigheR! StongeR! - A Guide to Speeding Up R Code for Busy People
  6. Select operations on R data frames
  7. TV shows rated by episode as a Shiny App

Sponsors

Mango solutions
mango-solutions.com
Zero Inflated Models and Generalized Linear Mixed Models with R
Quantide: statistical consulting and training
RStudio homepage
RStudio: a free and open source IDE for R
REvolution analytics
HMS Analytical Software GmbH
http://www.eoda.de
Zero Inflated Models and Generalized Linear Mixed Models with R Zero Inflated Models and Generalized Linear Mixed Models with R. Zuur, Saveliev, Ieno (2012).