Consider the following hypothesis statement using o =0.10 and data from two independent samples. Assume the population variances are not equal and the populations are normally distributed. Complete parts a and b. Ho: H1 - H2 20 X, = 138.0 X2 = 151.6 Hy: H1 - H2 0 Sy = 18.5 52 = 26.6 n, =35 n2 = 18 a. Calculate the appropriate test statistic and interpret the result. The test statistic is]. (Round to two decimal places as needed.)