February 21, 2017

Homework Help: Statistics

Posted by Lynn on Sunday, March 29, 2009 at 11:13pm.

I have a question that involves explaining what is wrong in each of the following situations:
(a) A random sample of size 20 is taken from a population that is assumed to have a standard deviation of 12. The standard deviation of the sample mean is 12/20.

(b) A researcher tests the following null hypothesis: Ho:mean of the sample = 10

(c) A study with a sample mean = 48 reports statistical significance for Ha : u > 54.

(d) A researcher tests the hypothesis Ho : u = 50 and concludes that the population mean is equal to 50.

Help is appreciated I have answers already, but wanted to know if they were right. Thank you!!!!

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