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Answer:
A) Barnsboro Bank has more variation.
Step-by-step explanation:
Coefficient of Variation:
The coefficient of variation is given by the division of the standard deviation by the mean.
In this question:
The account balance with the highest coefficient of variation has more variation.
Barnsboro National Bank shows an average account balance of $315 with a standard deviation of $87.
So
Wellington Savings and Loan shows an average account balance of $8350 with a standard deviation of $1800.
So
Barnsboro Bank has the higher cv, so more variation, and the answer is given by option A.