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Random samples of n 1 = 2 1 and n 2 = 2 1 were selected from populations 1 and 2 , respectively. The corresponding

Random samples of n1=21 and n2=21 were selected from populations 1 and 2, respectively. The corresponding sample standard deviations were s1=17.5 and s2=10.5.
(a) Do the data provide sufficient evidence
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