Question 1165054
I would like to assume that the students were treated the same, or even better, neither the teachers nor the students knew what group they were in.
Ho: gifted=regular
Ha: gifted not = regular
alpha=0.05 P{reject Ho|Ho true}
test is t two tailed df=22
critical value is |t|>2.074
test is (xbarG-xbarR)/sqrt [(s1^2/n1)+(s2^2/n2)]
the denominator is sqrt (2.341+1.613)=1.988
numerator is 4.3
t=2.163
This is greater than 2.074 so reject Ho and conclude the two populations are different.
p-value=0.042.