Homework Help: Statistics

Posted by Jen on Thursday, August 20, 2009 at 12:33am.

test the claim that μ1 = μ2 Two samples are randomly selected from normal populations. The sample statistics are

n1=11,x(bar)=4.8, s1=.76

n2=18, x(bar)=5.2, s2=.51

Assume that σ1 ≠ σ2
Use alpha = .02

I am not sure if this is a 2-sample t test or do I use ANOVA?

Please show me all steps to get to the answer.

Statistics - Jen, Thursday, August 20, 2009 at 12:35am
Alpha = .02

Am I using the 2-sample T test or ANOVA?
Statistics - PsyDAG, Thursday, August 20, 2009 at 11:52am
Calculate Z = (μ1-μ2)/Standard Error (SE) for difference between means.

SE Difference = sq. rt. of (SE1^2 + SE2^2)

SE = Standard Deviation/Sq rt of n-1

Since it is two-tailed, look for Z < .01 to reject null hypothesis.

I hope this helps. Thanks for asking.

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