The Barclaycard Business Travel Survey is conducted annually. One question asked in two consecutive years was, “Have you considered reducing hours spent away from home to increase quality of life?” The following table represents the responses:

Year 1 Year 2 Total Yes—have reduced 400 384 784 Yes—not been able to 400 300 700 No—not certain 400 516 916 Total 1,200 1,200 2,400

a. Determine if the response to the survey question was independent of the year in which the question was asked. Use a significance level of 0.05.

b. Determine if there is a significant difference between the proportion of travelers who say they have reduced hours spent away from home between the two years.