21. Find x in the equation The correct answer: for a ¹ −1: for a = −1: x can be any number | % of subjects that isolated x properly | % of subjects who expressed x correctly, then simplified and specified the correct definition domain | % of subjects who did not reduce and didn’t specify the definition domain | % of subjects who expressed x correctly, specified the definition domain but did not reduce the resulting equation. | % of subjects who expressed x correctly and reduced correctly, but did not specify the domain definition | |||||
P | S.T | P | S.T | P | S.T | P | S.T | P | S.T | |
36 | 73 | 1 | 19 | 8 | 30 | 0 | 5 | 27 | 19 | |
p = 0.05 | p = 0.00 |