Please help with this problem.

2) Men and women were asked to rate President Obama's job performance on a scale from 1 (Extremely poor performance) to 7 (Extremely strong performance). Their responses are arrayed below. Test the null hypothesis of no difference between Men's and Women's ratings of President Obama's performance. What is the difference between means? Can we be 95% confident that this difference is statistically significant? (5 points) Men Women 3 7 1 5 A N - a W AUT U AN Men Women Mean: Mean: Variance: Variance: Standard error: t-score (calculated): Degrees of freedom: t-score (book): Answer in words