[R] how to split and use notation fro stacked data

[Nordlund, Dan (DSHS/RDA)]

I will suggest that you read the documentation on t.test. 

?t.test


Dan

Daniel Nordlund, PhD
Research and Data Analysis Division
Services & Enterprise Support Administration
Washington State Department of Social and Health Services


> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Joanna
> Nguyen
> Sent: Wednesday, February 24, 2016 10:36 AM
> To: r-help at r-project.org
> Subject: [R] how to split and use notation fro stacked data
> 
> I have a data set as below
> 
> "temperature" "gender" "hr"
> 96.3 1 70
> 96.7 1 71
> 96.9 1 74
> 96.4 2 69
> 96.7 2 62
> 96.8 2 75
> 
> Gender code (1) means males and Gender code (2) means females.
> I have to split the data by gender and then perform a* two-sample tes*t to
> see whether the population means are equivalent. When using a function
> to solve this I should use the *notation for stacked data*. I *cannot assume
> equal variances* How can I code them?  I am just a beginner for R
> programming Thanks
> --
> Joanna Thuc Quyen Nguyen
> 
> 	[[alternative HTML version deleted]]
> 
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