1.Write the null and research hypothesis in mathematical notation and in words.

H0:

H1:

2.What is the resulting t statistic? Is the t statistic significant? Why?

3.Interpret this output (the t-test output) in words using our variables; (is there a significant difference between males and females in the exam grades? If there is a difference, who performed better?

Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of Sig. (2- Mean Std. Error the Difference F Sig. it df tailed) Difference Difference Lower Upper stats exam Equal variances .333 .567 -2.206 43 033 -6.860 assumed 3.109 -13.130 -.590 Equal variances not -2.180 38.728 .035 -6.860 assumed 3.147 -13.226 -.494Group Statistics Std. Std. Error Gender N Mean Deviation Mean stats exam male 20 64.50 10.962 2.451 female 25 71.36 9.865 1.973