Test H0 : μ1=μ2 vs Ha : μ1>μ2 when the samples have n1=n2=70 , x¯1=35.7 , x¯2=33.5 , s1=1.22 , and s2=1.14 . The standard error of x¯1-x¯2 from the randomization distribution is 0.20 . Find the value of the standardized z-test statistic.