The dependent t-test for paired samples

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Reference no: EM1313613

Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works. Even Dave, the leading sales person, thought it worked, but couldn't really tell. So, they hired your local help stat star and asked whether training made a difference. Here are the data-you tell Jack whether it worked.

Month	Before Training	After Training
Dec	$58,676	$87,890
Jan	$46,567	$87,876
Feb	$87,656	$56,768
Mar	$65,431	$98,980
April	$56,543	$98,784
May	$45,456	$65,414
June	$67,656	$99,878
July	$78,887	$67,578
Aug	$65,454	$76,599
Sep	$56,554	$88,767
Oct	$58,876	$78,778
Nov	$54,433	$98,898

Reference no: EM1313613

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