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What are the limitations of graphical method?
The graphical method is suitable only if there are exactly 2 variables. If the no . of variables are 3, constructing a 3-D graph is quite difficult to interpret . If the no. of constraints are more, the graph becomes a mess.
Explain the difference between linear dynamic range with analytical range?
Analytical range refers to the method/procedure used, It can include a non linear response. If you plot the analytical results versus the reference values you will have a linear curve. The linear range could be more precisely given by saying the linear instrument range
Can a linear trend line can be obtained by using a least square method rather than a scatter diagram method?
A scatter diagram will give a quick but rough extimate of the trend line - especially if there is a lot of variation about the trend. The least squares method will be more accurate.
Which one is a more accurate measurement 1.005 or 1.01 or 1.0 or 1?
The more accurate number - is 1.005 - as it is accurate to more decimal places than the other examples.
Which number is in a most accurate format 2.5 or 2.5000?
They are both the same but 2.5 is more accurate because the zeros after 2.5 have no values
