A physical therapist is interested in whether people with different bone structures will be affected differently by her new therapy program.She randomly chooses two groups of patients based on bone type: small-boned frame (XS) and large-boned frame (XL) .Patients all had similar injuries.She measures the number of days each person takes to progress to a predetermined point.Here is the data: 
What is the estimated standard error of the difference?
Definitions:
EPS Growth Rate
The rate at which a company's earnings per share (EPS) has grown or is expected to grow.
Rate of Return
The financial gain or loss encountered on an investment over a fixed term, represented as a percentage of the investment's first expenditure.
EPS
Earnings Per Share, a key indicator of a company's profitability, calculated as the company's profit divided by the number of outstanding shares.
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