"lower.tail" in R I usually get confused on how to use the argument in "pt" function and similar function. Here I will focus on t-distribution. I will utilize Minitab for graphical presentation. A:- lower.tail is FALSE In R The code is > pt(q = -2.262, df = 9, lower.tail = FALSE) The output [1] 0.9749936 In Minitab This is shown as in the graph from Minitab. So when FASLE is chosen, the calculation will give the area after the critical value. B:- "lower.tail" is TRUE In R the code is pt(q = -2.262, df = 9, lower.tail = TRUE) the output is [1] 0.02500642 In Minitab When TRUE is used, it orders R to compute the area before the critical value.
"lower.tail" in R
I usually get confused on how to use the argument in "pt" function and similar function. Here I will focus on t-distribution. I will utilize Minitab for graphical presentation.
A:- lower.tail is FALSE
In R
The code is
> pt(q = -2.262, df = 9, lower.tail = FALSE)
The output
[1] 0.9749936
In Minitab
This is shown as in the graph from Minitab.
So when FASLE is chosen, the calculation will give the area after the critical value.B:- "lower.tail" is TRUE
In R
the code is pt(q = -2.262, df = 9, lower.tail = TRUE)the output is [1] 0.02500642
In Minitab
When TRUE is used, it orders R to compute the area before the critical value.
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