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Use the formula to find the standard error of the distribution of differences in sample means,...

Use the formula to find the standard error of the distribution of differences in sample means, x1 - x2. (there are lines above both x's but my computer won't transcribe it)

Samples of size  45 from Population 1 with mean  3.4 and standard deviation  1.5 and samples of size  45 from Population 2 with mean  1.9 and standard deviation  1.4

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Expert Solution

x1                     = 3.400 x2                    = 1.900
s1                     = 1.500 s2                    = 1.400
n1                    = 45.000 n2                    = 45.000
standard error se=√(S21/n1+S22/n2)=sqrt(1.5^2/45+1.4^2/45) = 0.3059

orchestra answered 3 years ago
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