Test the claim about the difference between two population means and at the level of significance . Assume the samples are random and independent, and the populations are normally distributed. Claim: 1=2; a=0.01 Population parameters: 1 = 3.4, 2= 1.5, Sample statistics: x1= 17,n1= 31, x2= 19,n2=29 Determine the standardized test statistic. (Round to two decimal places as needed.)