A t-test is a ratio of ___________ to ___________.（ ）
A: expected values; observed values
B: between-group differences; within-group differences
C: success; failure
D: highest scores; lowest scores
A: expected values; observed values
B: between-group differences; within-group differences
C: success; failure
D: highest scores; lowest scores
举一反三
- The differences of scores between boys and girls are limited only to the US.
- The differences between male and female brains are the major causes of the scores between boys and girls.
- Through the group discussion between ______ , we figured out the differences between adolescence and adulthood.
- The differences between the Beijing-style qipao and the Shanghai-style qipao reflect the various aesthetic values of different regions in China.
- The differences between the Beijing-stule qipao and the Shanghai-style qipao refelct the various aesthetic values of different regions in China.