Given two normally distributed populations with equal means and variances of s2 1 240 and s2 2 350, what is the probability that samples of size n1 40 and n2 35 will yield a value of x1 x2 as large as or larger than 12 ...

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Given two normally distributed populations with equal means and variances of s2 1 240 and s2

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Given two normally distributed populations with equal means and variances of s2 1 ¼ 240 and s2 2 ¼ 350, what is the probability that samples of size n1 ¼ 40 and n2 ¼ 35 will yield a value of

x1 x2 as large as or larger than 12?

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