If Q_obt= 3.90 and Q_crit = 4.04, what conclusion can we draw?

Select one:

a. There are significant mean differences somewhere among the group means, but further testing is needed to determine where.

b. There are not significant mean differences among any of the group means so this problem is finished.

c. There is a significant difference between the two means used to calculate Q.

d. There is not a significant difference between the two means used to calculate Q.