A Researcher Sampled 16 Couples and Measured the Mean Difference

Multiple Choice

A researcher sampled 16 couples and measured the mean difference in their marital satisfaction.Each couple was paired and the differences in their ratings (on a 7-point scale) were taken.If the mean difference in satisfaction ratings for this sample was 1.8±2.0 ( ) ,then what is the decision at a .05 level of significance?

A) Satisfaction ratings do not significantly differ,t(14) = 0.90.
B) Satisfaction ratings do not significantly differ,t(15) = 0.90.
C) Satisfaction ratings significantly differ,t(14) = 3.60.
D) Satisfaction ratings significantly differ,t(15) = 3.60.