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The problem and question are in the attached file. # 8.4 8.5 8.6

The problem and question are in the attached file.
# 8.4
8.5
8.6
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Solution
It is given that, x1 = 6.56, s1 = 0.64, n1 = 25, x2 = 6.80, s2 = 0.76, n2 = 40.
The test statistic for testing H 0 t= where s = : µ1 = µ 2 against H1 : µ1 ≠ µ2 is given by, x1 −...

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