Ace used-car sales manager Jack has no idea whether the \(\$ 100,000\) he pays for training for his used-car salespeople works. He asks Dave, the leading salesperson, and Dave says he thinks it works but can't really tell. So, Jack has hired your local helpful stats star and asked whether the training makes a difference. Here are the data you tell Jack whether the training worked.

Transcribed Image Text:

Month December Before Training After Training $58,676 $87,890 January $46,567 $87,876 February $87,656 $56,768 March $65,431 $98,980 April $56,543 $98,784 May $45,456 $65,414 June $67,656 $99,878 July $78,887 $67,578 August $65,454 $76,599 September $56,554 $88,767 October $58,876 $78,778 November $54,433 $98,898