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Results tagged with r
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user 252724
Use this tag for any *on-topic* question that (a) involves `R` either as a critical part of the question or expected answer, & (b) is not *just* about how to use `R`.
0
votes
2
answers
312
views
How and when to perform a two sample t-test or a two sample z-test?
I have a data set about 5,699 PhD students. The first column called "Year" is how many years it took for candidate to graduate with a Ph.D (1, 2,...14), the second column "Uni" is which university the …
- 87
0
votes
0
answers
58
views
How and when to perform a two sample t-test or a two sample z-test?
I have a data set about 5,699 PhD students. The first column called "Year" is how many years it took for candidate to graduate with a Ph.D (1, 2,...14), the second column "Uni" is which university the …
- 87
3
votes
3
answers
276
views
Visualizing categorical data with 7 variables
I'm working with a grouped data set on the presence of a particular disease (Byssinosis):
>head(data)
Employment Smoking Sex Race Workspace Byssinosis Non.Byssinosis
1 <10 Yes M …
- 87
1
vote
1
answer
229
views
Should I compare the median or mean for my data?
I have a data frame in R that contains the information about 252 freshman university students. …
- 87