Which of the following is most likely to produce a statistically significant t_obs=((m_1-m_2 ))/s_(m_1-m_2 ) , when s_1^2 = 12 and s_2^2 = 8?
a. ? = .05, n1 = 20, n2 = 10
b. ? = .05, n1 = 10, n2 = 20
c. ? = .01, n1 = 20, n2 = 10
d. ? = .01, n1 = 10, n2 = 20
Ans: B
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