Introduction to Statistics (MAT/SST 115.03 2008S)
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Since we ended up with very different sample sizes (I'm not sure why),
I've put the data into two files, Convenient.csv
and Inconvenient.csv
.
Convenient = read.csv("/home/rebelsky/Stats115/Data/ConvenientSequence.csv") Inconvenient = read.csv("/home/rebelsky/Stats115/Data/InconvenientSequence.csv")
Here are the commands you might use to build four windows with the four separate displays.
library(BHH2, lib="/home/rebelsky/Stats115/Packages") X11() boxplot(Convenient,horizontal=T) X11() boxplot(Inconvenient,horizontal=T) X11() dotPlot(Convenient) X11() dotPlot(Inconvenient)
Are we doing a two-sided test or a one-sided test? If you're using a one-sided test, which is the direction of the test? Use your answer to figure out which of the following commands to select.
t.test(Convenient,Inconvenient) t.test(Convenient,Inconvenient, alternative="greater") t.test(Convenient,Inconvenient, alternative="less")
Add conf.level=.90
to your previous answer to compute
the confidence interval.
Primary: [Front Door] [Syllabus] [Current Outline] [R] - [Academic Honesty] [Instructions]
Groupings: [Applets] [Assignments] [Data] [Examples] [Handouts] [Labs] [Outlines] [Projects] [Readings] [Solutions]
External Links: [R Front Door] [SamR's Front Door]
Copyright (c) 2007-8 Samuel A. Rebelsky.
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