Standard Deviation Table Negative. Start at the row for 0 4 and read along until 0 45. Here x mean is squared so this cannot be negative n number of terms cannot be negative hence sd cannot be negative.
It shows how far away a particular score is from the group mean using standard deviation for that population to define the scale. To conclude the smallest possible value standard deviation can reach is zero. Z 0 00 0 01 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 09 3 4 0 0003 0 0003 0 0003 0 0003 0 0003 0 0003 0 0003 0 0003 0 0003 0 0002 3 3 0 0005 0 0005 0 0005 0 0004 0 0004 0 0004 0 0004 0 0004 0 0004 0 0003 3 2 0 0007 0 0007 0 0006 0 0006 0 0006 0 0006 0 0006 0 0005 0 0005 0 0005 3 1 0 0010 0 0009 0 0009 0 0009 0 0008 0 0008 0 0008 0 0008 0 0007 0 0007 3 0 0 0013 0 0013 0 0013 0 0012 0 0012 0 0011 0 0011 0 0011 0.
Table of standard normal probabilities for negative z scores.
While standard deviation the result can t be negative the individual numbers that you calculate standard deviation for can reach any value including negative. If you want to know the area between the mean and a positive value you will the second table 1 2 above which is the right hand positive z table. For george s example we need to use the 2nd table as his test result corresponds to a positive z score of 0 67. Standard deviation may be abbreviated sd and is most commonly.
