The table below shows the distribution of cases of depression by amount of coffee consumption among a random sample of over 50 thousand individuals.

		Coffee Consumption (cups/week)
		0	1-6	7-12	13-18	>18	Total
Clinical Depression	Yes	670	373	905	564	95	2,607
No	11,545	6,244	16,329	11,726	2,288	48,132
	Total	12,215	6,617	17,234	12,290	2,383	50,739

Is there evidence to conclude that coffee consumption and depression are not independent at the 5% alpha level? How many degrees of freedom does your test statistic have?

HINT: Using STATA will be far easier than hand calculation here (use the "Table Calculator" function within the "Frequency Tables" section of "Statistics").

Select one:

a.

Yes with 4 degrees of freedom

b.

Yes with 8 degrees of freedom

c.

Yes with 9 degrees of freedom

d.

No with 4 degrees of freedom