Question: A statistical program is recommended. A company that sells musical instruments has been in business for five years. During that time, sales of pianos increased
A statistical program is recommended.
A company that sells musical instruments has been in business for five years. During that time, sales of pianos increased from 13 units in the first year to 77 units in the most recent year. The firm's owner wants to develop a forecast of piano sales for the coming year. The quarterly sales data follow.

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