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January 24, 2015

January 24, 2015

Posted by **Anonymous** on Sunday, July 24, 2011 at 2:44pm.

Would you reject the manufactures claim at a 5% significance level? Explain

- Statistics -
**PsyDAG**, Monday, July 25, 2011 at 2:06pmZ = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√n

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score. Is it less than .05?

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