A random sample of 30 Georgia residents provided a mean income of $46,000 earned last year....

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Question

A random sample of 30 Georgia residents provided a mean income of $46,000 earned last year....

A random sample of 30 Georgia residents provided a mean income of $46,000 earned last year. Another sample from Ohio residents showed a mean income of $43,000 during the same period. Did Georgia residents earn a higher income compared to the Ohio ones last year?

The test statistic is…

a)

z

b)

t

c)

f

d)	None of the above

math Statistics-And-Probability

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Answer 1

Answer #1

Ans.

Note: If the variances of both the samples are known, then you use the Z test

If the variances of both samples are same but not know then you can use t teat

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Answer 2

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