Internet sites often ask for a secret phrase to recover lost passwrds. Jason encoded a secret phrase using matrix multiplication
. He multiplied the clear text code for each letter by the matrix:
The matrix representing the encoded text is:
Jason’s secret phrase is:
Clear text encoding:
Decoding a Message by Finding An Inverse
The matrix representing the encoded text is:
Jason’s secret phrase is:
Clear text encoding:
Decoding a Message by Finding An Inverse
2 answers:
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Answer:
Group A has greater variability
Step-by-step explanation:
Group A: 80, 100, 190, 110, 70, 90, 130
The variability of group A data :
Taking the range :
Maximum = 190 ; Minimum = 70
Range = Maximum - Minimum ; 190 - 70 = 120
Group B : 50, 110, 100, 120, 107, 140, 150
The variability of group B data :
Taking the range :
Maximum = 150 ; Minimum = 50
Range = Maximum - Minimum ; 150 - 50 = 100
Hence, Group A has greater variability
