A researcher classifies a group of people into three age groups and measures whether each person used Facebook during the previous week (yes/no). The researcher uses a chi-square test for independence to determine if there is a significant relationship between the two variables. If the researcher obtains x2 5 6.75, then what is the correct decision for the test?

a. Reject H0 for a 5 .05 but not for a 5 .01.

b. Reject H0 for a 5 .01 but not for a 5 .05.

c. Reject H0 for either a 5 .05 or a 5 .01.

d. Fail to reject H0 for a 5 .05 and a 5 .01.