Level:
Project ID:
1103134405
Accepted:
1
Clonable:
0
Easy:
0
The students are evaluated according to the grading scale from \( 1 \) to \( 5 \), while \( 1 \) is the best grade and \( 5 \) is the worst one. In the pictures, there are visualizations of relative frequencies of grades in Math, which students of two groups (A and B) had in their year-class-reports. Calculate the variance of grades for each group of students and determine, in which group student performances of Math knowledge are more balanced. I.e. from the offered choices choose the group, which has more balanced grades and with the correct variance of grades. The variance is rounded to two decimal places.
A: \( 0{.}81 \)
B: \( 0{.}84 \)
A: \( 0{.}90 \)
B: \( 0{.}92 \)