Your question is Assess Seasonal Trends in Monthly Sales Data. Take a moment with it on the right.
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RetailCo, a company selling home goods, is analyzing its monthly sales data to identify seasonal trends. The management suspects that sales may increase during the holiday season and wants to quantify this effect.
| Month | Sales (in $) |
|---|---|
| Jan | 20000 |
| Feb | 21000 |
| Mar | 25000 |
| Apr | 23000 |
| May | 24000 |
| Jun | 30000 |
| Jul | 35000 |
| Aug | 32000 |
| Sep | 28000 |
| Oct | 40000 |
| Nov | 45000 |
| Dec | 60000 |
The company wants to determine if the increase in sales during the last quarter is statistically significant compared to the first quarter.