# Tagged Questions

87 views

### Bootstrap on correlation coefficients in R [closed]

For each round of bootstrapping (say $n=1000$), I would like to select the genotypes (the columns) at random without replacement from the original dataset. With this I would like to form two groups ...
21 views

### Rescaling columns of bootstrapped matrix when using matrix multiplication to compute correlation coefficients

If I have $n$ samples and want to compute the pairwise correlation coefficients between $l$ and $m$ variables, I can construct the matrices $A_{l,n}$ and $B_{n,m}$. If I then subtract the mean and ...
76 views

### Significance of correlation with only 11 datapoints

I am currently working on my thesis and calculating some simple correlation coefficients. I only have 11 datapoints available, but I would like to assess the statistial significance of my results. The ...
105 views

### How to interpret multimodal distribution of bootstrapped correlation?

I have two paired variables, x and y: person x y 1 124 100 2 79 94 3 118 105 ... Here is a scatterplot of the data: I ...
408 views

### Does using bootstrapping change how you deal with problems of Type I errors when testing multiple correlations?

I have been calculating p-values for correlations using bootstrapping. I've just been using the same p-value cutoff regardless of the number of pair-wise calculations. Intuitively, it seems to me that ...
466 views

### Bootstrap variables correlation in R

I wrote this R function in order to test between matrix (mat1, mat2) correlation by re-sampling the second matrix numR times to obtain correlation coefficient distribution against which to test the ...
36 views

### Calculating/approximating complete Mantel statistic from bootstrap estimates

I have two (sparse) large matrices (~ 1million by 1million) and want to compute Mantel statistic to find correlation between them. To counter memory problems, I have computed the mantel statistic ...