Which pattern describes repeating patterns within a year?

Which pattern describes repeating patterns within a year?

• A. Seasonal variation
• B. Cyclical variation
• C. Irregular variation
• D. Time series

Answer: (A)

Seasonal variation describes repeating patterns within a year caused by the calendar and seasonal factors. These patterns recur at roughly the same time each year—like higher sales in December or increased outdoor activity in summer—demonstrating a fixed yearly periodicity. This is different from cyclical variation, which unfolds over longer, multi-year spans and isn’t tied to the calendar; irregular variation is random noise; and time series is simply the data format in which such patterns are observed, not a pattern type itself. So the pattern described as repeating within a year is seasonal variation.

Seasonal variation describes repeating patterns within a year caused by the calendar and seasonal factors. These patterns recur at roughly the same time each year—like higher sales in December or increased outdoor activity in summer—demonstrating a fixed yearly periodicity. This is different from cyclical variation, which unfolds over longer, multi-year spans and isn’t tied to the calendar; irregular variation is random noise; and time series is simply the data format in which such patterns are observed, not a pattern type itself. So the pattern described as repeating within a year is seasonal variation.