Find the variance/covariance matriz for the following data set \[\

podnescijy 2021-11-16 Answered
Find the variance/covariance matriz for the following data set
StudentAlgebraCombinatoricsAnalysis19080902306030360605049060305407040
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Expert Answer

Harr1957
Answered 2021-11-17 Author has 18 answers
Step 1
908090306030606050906030407040Variance, from Excel function77080620
Correlations, from Excel function:
Corr(Algebra, Combinatorics)=0.3225=CORREL(E1:E5,F1:F5)
Corr(Algebra, Analysis)=0.5138=CORREL(E1:E5,G1:G5)
Corr(Combinatorics, Analysis)=0.8531=CORREL(F1:F5,G1:G5)
Corr(Algebra, Algebra)=1=CORREL(E1:E5,E1:E5)
Corr(Analysis, Analysis)=1=CORREL(G1:G5,G1:G5)
Corr(Combinatorics, Combinatorics)=1=CORREL(F1:F5,F1:F5)
Step 2
Variance/correlation matrix:
AlgebraCombinatoricsAnalysisAlgebra10.32250.5138Combinatorics0.322510.8531Analysis0.51380.85311
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