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Results tagged with hypothesis-testing
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user 8724
Hypothesis testing assesses whether data are inconsistent with a given hypothesis (usually a null hypothesis of no effect).
3
votes
Accepted
On the corrections for multiple comparisons
I don't think that the fact that you have found significant differences in all fifteen of your comparisons makes a difference. To maintain the familywise error rate, I would be tempted to simply apply …
- 2,140
2
votes
1
answer
313
views
Hypothesis test for summary data involving percentages
500 patients had an operation to remove stomach cancer. There exists a clinical guideline that suggests that a minimum of ten lymph nodes should be removed during the operation. I am therefore interes …
- 2,140
1
vote
2
answers
173
views
Help performing hypothesis tests automatically on a large data set in R
I have a data frame in R with 100 variables (columns) and 100 observations (rows). Each row is a patient; the columns are different variables such as gender, height, body-mass index, etc. I know that …
- 2,140
16
votes
4
answers
45k
views
Hypothesis test for difference in medians among more than two samples
Question
The test scores of three groups of people are saved as separate vectors in R.
set.seed(1)
group1 <- rnorm(100, mean = 75, sd = 10)
group2 <- rnorm(100, mean = 85, sd = 10)
group3 <- rnorm(1 …
- 2,140