Homework Help: Statistics

Posted by Jen on Thursday, April 29, 2010 at 3:13pm.

A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 34 each.

A. Find the mean of the sample of 14 measurements.

Mean =

B. Find the standard deviation of the sample of 14 measurements.

Standard Deviation =

Statistics - PsyDAG, Friday, April 30, 2010 at 9:53pm
Since the two additional scores = the mean, the mean and the standard deviation will not change.
Statistics - Anonymous, Sunday, May 2, 2010 at 7:19pm
WRONG!
Statistics - Anonymous, Wednesday, May 5, 2010 at 2:44am
hey we had the same question on webwork, what bull!@#$%^&. you get an answer? please help.

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