i need to create 2 graphs to show if changing the standard deviation and mean helps in getting closer to a nominal value
1st one is in a range of 19k -24k mean = 21.5k s.d = 2k for this i get -1.25 and 1.25
2nd one same range but mean is 21.8 and sd = 1k
for this i get 19-21.8 = -2.8 then 24 -21.8 = 2.2
1 1
in my text book im told to have the mean as the centre point and use s.d as each unit on the x axis but the 2 will look a little different as im trying to make them equal across the X axis and stick to their s.d units.
Hope this makes sense, ive been stuck on this all day
1st one is in a range of 19k -24k mean = 21.5k s.d = 2k for this i get -1.25 and 1.25
2nd one same range but mean is 21.8 and sd = 1k
for this i get 19-21.8 = -2.8 then 24 -21.8 = 2.2
1 1
in my text book im told to have the mean as the centre point and use s.d as each unit on the x axis but the 2 will look a little different as im trying to make them equal across the X axis and stick to their s.d units.
Hope this makes sense, ive been stuck on this all day