A study by a bank compared the average savings of customers who were depositors for three years or less, with those who had been depositors for more than three years. The results of a sample are: 
What is the computed test statistic? Round to two decimal places.
Definitions:
Dynamic Trait
A characteristic or quality of an individual that is in constant change, growing or declining over time.
Surface Trait
Observable qualities or characteristics of personality that can easily be inferred from behavior.
Constitutional Trait
A characteristic or feature of an individual's physical or psychological makeup that is considered to be largely influenced by genetic inheritance.
16 PF
The Sixteen Personality Factor Questionnaire, a self-report personality test developed to assess human personality traits.
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