Please write a comment on the below discussion post in a minimum of 100 words. Please give an example and also a reference. It should not be directly copy-pasted from the internet.
According to Cooper, Schindler (pg. 643), and Seasonal Variation, Patterns of change in a time series within a year. This is where a business goes through an entire year, dealing with their product, which could be weekly, your product could see changes quarterly or monthly depending on the season. Most businesses have these periods of ups and downs, one type of business is lawn mowing your best season is spring and summer. Cooper, Schindler (2012), Business Research Methods, Statistical Techniques in Business & Economics, Ch. 18: Time Series, and Forecasting. Retrieved from https://phoenix.vitalsource.com/#/books/1259698246/cfi/6/42!/4/4/62/8@0:100