Simple average Knowledge level (N) Knowledge level (N) Knowledge level (N) Knowledge level (N)
1 (325) 2 (682) 3 (770) 4 (82)
My blood type 3.047 3.282 3.474 3.930
Other Blood type 2.893 3.017 3.154 3.350
Difference 0.154 0.265 0.319 0.581
No. of reverse item(s) 1 2 1 1