one sample t-tests applied to each row - 'data are essentially constant' error
101468
t.test returns an error "data are essentially constant"
46848
Test of whole distribution for two samples
82287
Choosing between $z$-test and $t$-test
91753
t-test or z-test: assume normality or s≈σ?
111576
Formula to generate Critical t-values for t-test (instead of using a look-up array)
11124
Normality of residuals vs sample data; what about t-tests?
135276
T-test equal variances, unequal sample sizes
22531
Testing for linear dependence among the columns of a matrix
32215
Why is the t-test designed for small samples?
127708
Rolling analysis with out-of sample
78109
If and how to use one-tailed testing in multiple regression
112836
T test two data set 3 variables per data set, can be used?
15075
How to choose between t-test or non-parametric test e.g. Wilcoxon in small samples
106646
Prove F test is equal to T test squared
27797
Is there a t-test equivalent to Stouffer's z-test?
1637
R : use of t.test function in data frame or matrix
5198
Is it possible to combine the F-test and t-test to test for differences in both the variance and the mean?