The following table was created from the data for this week's assignment;

	IRREGULAR SEAT BELT USE?
	YES	NO	TOTAL
Texted While Driving	1737	2048	3785
Did Not Text While Driving	1945	2775	4720
TOTAL	3682	4823	8505

EXPECTED FREQUENCY PER CATEGORY:

Texted While Driving (Yes) = 3682 x 3785/8505 = 1638.61

Did Not Text While Driving (Yes) = 3682 x 4720/8505 = 2043.39

Texted While Driving (No) = 4823 x 3785/8505 = 2146.39

Did Not Text While Driving (No) = 4823 x 4720/8505 = 2676.61

1. How can I determine the value of the X² statistic?

2. Using a 0.05 significance level to test the claim of independence between texting while driving and irregular seat belt use.

a) Are those two risky behaviors independent of each other?

b) How can I calculate the chi-square using Excel.