1. should the equal variances assumed row be used in this case? why or why not?2. what is the null hypothesis?3. what is the mean difference between female and male senators approval ratings?

alExam - Word O Search Ices Mailings Review View Help AaBbCcI AaBbCcI AaBbC Aab AaBbCCD AaBbCcL Aal A 1 Normal No Spac... Heading 1 Title Subtitle Subtle Em... En Paragraph Styles T-Test Comparing Female and Male Senators' Approval Ratings Group Statistics Seantor's Sex N Mean Std. Deviation Std. Error Mean Senate Approval Rating Male 928 47.26 7.357 241 Female 270 47.36 6.319 385 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means Std 95% Confidence Mean Error Interval of the Sig. (2- Differencikferenc Difference Sia df tailed) Lower Upper Senate Equal variances 3.227 073 -192 1196 848 -.095 493 -1.063 873 Approval assumed Rating Equal variances .209 500.3 .835 -.095 454 -.987 797 not assumed 99 L M W