Homework Help: college, statistics

Posted by mary on Monday, October 11, 2010 at 11:55pm.

a math test has a mean of 43 and a standard deviation 0f 17.0. find the corresponding z scores for. show all work.

I. a test score of 13
II. a test score of 59

college, statistics - TutorCat, Tuesday, October 12, 2010 at 2:42am
z = (x - mean)/(standard deviation)
college, statistics - mary, Tuesday, October 12, 2010 at 11:30am
how is the problem worked out?
college, statistics, z score - cat, Wednesday, October 13, 2010 at 7:05pm
hey cat:
thank you for the information. so clarify i would just plug in the test scores such as 13 and 59 for the x value and 43 for mean with 17.0 for the standard deviation to come up with the following :

z=(13-43)/17.0= 10.47058824 to round off to 10.0?
z= (59-43)/17.0=56.47058824, round off to ?

please coonfirm and show where i went wrong. thank you very much.
mary
college, statistics - Nneka, Wednesday, March 9, 2011 at 1:44am
Z=(13-43)/17=-1.76
Z=(59-43)/17=0.94

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