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2024 Dec 23
1
Calculation of critical probability from lm()
...e the values of critical probabilities reported from lm() function in R as below ctl <- c(4.17,5.58,5.18,6.11,4.50,4.61,5.17,4.53,5.33,5.14) trt <- c(4.81,4.17,4.41,3.59,5.87,3.83,6.03,4.89,4.32,4.69) group <- gl(2,10,20, labels=c("Ctl","Trt")) weight <- c(ctl, trt) model_coed <- summary(lm(weight ~ group))[[4]] print(pt(abs(model_coed[, 1] / model_coed[,2]), length(ctl) - 1, lower.tail = F) * 2) ##2.795811e-09 2.640187e-01 However, this value is not matching with print(model_coed) Could you please help me to understand where I made wrong in my calculation?