Question 1:
Consider three blocks, each with dimensions Lx=20,Ly=20. The variogram has parameters C0=1.7, C=7.2, ax=50, ay=90.
For each configuration please determine the estimation variance 
when using the indicated sample(s) to estimate the grade of the block.
This question is in parts, so you must enter results for individual terms of the calculation. Note that your final result for each must include the nugget, but individual terms may omit the nugget and will still be marked correctly.
Please enter your answer is correct to 2 decimal places.
(a) Config What is the value of 
?
(b) Config A: What is the value of 
(c) Config A: What is the value of 
(d) Config B: What is the value of 
(e) Config B: What is the value of 
(f) Config B: What is the value of
(g) Config 8: What is the value of 
for the 4 samples ?
(h) Config C: What is the value of 
(i) Config C: What is the value of
(j) Config C: What is the value of 
for the 5 samples ?
(k) Comparison: Which of the following statements is TRUE? Note that there are multiple TRUE statements, please identify ALL of them.
Configuration C will cost much more than configuration 8 because the additional sample in the middle of the block implies that many additional drill holes are needed when you repeat the process on a regular grid over a large region.
The decision over the spacing and configuration of samples will depend on budgetary constraints, U the adequacy of the estimation, and other constraints of a potential mining operation.
Configuration B is more worthwhile than configuration A for the same cost when you consider that U samples are taken on a regular grid over a large region Mere will always be 4 neighbouring samples (so why not use them to improve the estimation).
Configuration C should always be used in practice even if it costs more to drill the extra samples
Configuration A should always be used in practice because the extra samples cost more but do not improve the estimation by much
Configuration C has the lowest variance
Configuration A has the lowest valiance
Please refer attachment for complete requirements.
Attachment:- Assignment-Intro-to-Geostatistics.docx