I would like detect the text of a tkinter ttk entry widget

So i just wanted to understand why tkinter is not sticking the sizegrip to the bottom right (SE) of the root window if I dont’t call .columnconfiguration() and .rowconfiguration() methods on the root. It’s behaving in weird ways and I don’t understand why.

I currently have a ttk.Notebook, tabControl, that is initialized with a singular tab, first tab. That tab comes with a tk.Text, txt.

I have a function which should output which test scores are significantly higher than the other test scores. There are four tests (a, b, c and d). The user will input the test scores and check different checkbuttons if there are significant differences between any of the test scores. There are 6 checkbuttons in total: “a & b”, “a & c”, “a & d” and so on. The user will have access to all this info beforehand.