The following MINITAB output presents the results of a hypothesis test for the difference Hx - Hy between two population means: Two-sample T for X vs Y N Mean StDev SE Mean 135 3.94 2.65 0.23 180 4.43...

Extracted text: The following MINITAB output presents the results of a hypothesis test for the difference Hx - Hy between two population means: Two-sample T for X vs Y N Mean StDev SE Mean 135 3.94 2.65 0.23 180 4.43 2.38 0.18 Difference = mu (X) – mu (Y) Estimate for difference: -0.484442 95% upper bound for difference: -0.007380 T-Test of difference = 0 (vs <): t-value="-1.68" p-value="0.047" df="270" is="" this="" a="" one-tailed="" or="" two-tailed="" test?="" a.="" b.="" what="" is="" the="" null="" hypothesis?="" can="" h,="" be="" rejected="" at="" the="" 5%="" level?="" how="" can="" you="" tell?="" c.="" d.="" the="" output="" presents="" a="" student's="" t="" test.="" compute="" the="" p-value="" using="" a="" z="" test.="" are="" the="" two="" results="" similar?="" use="" the="" output="" and="" an="" appropriate="" table="" to="" compute="" a="" 99%="" confidence="" interval="" for="" hy-="" hy="" based="" on="" the="" z="" statistic.="">