The same poll as in Exercise 9 also asked the questions "Did you use the Internet yesterday?" and "Are you White, Black, or Hispanic/Other?" Is the response to the question about the Internet independent of race? The data follow:
|
id You Use the Internet Yesterday?
Yes No
|
|
White Black
Hispanic/Other
|
2546 856
314 146
431 174
|
a) Under the null hypothesis, what are the expected values?
b) Compute the x2 statistic.
c) How many degrees of freedom does it have?
d) Find the critical value for a = 0.05.
e) What do you conclude?