The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. 
What is the relative frequency of the orders delivered from 1 day up to 3 days?
Definitions:
Enduring Traits
Persistent characteristics or qualities of an individual's personality that are stable over time and across situations.
Social Leadership
The ability to guide, influence, or direct a group towards achieving shared goals.
Structured Interviews
A systematic method of interviewing where each respondent is asked a set of predetermined questions in a specific order.
Performance Appraisal
A systematic evaluation of an employee's work performance over a specific period of time.
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