Question: From two normal populations assumed to have the same variance, independent random samples of sizes 15 and 19 were drawn. The first sample (with n1

From two normal populations assumed to have the same variance, independent random samples of sizes 15 and 19 were drawn. The first sample (with n1 = 15) yielded mean and standard deviation 111.6 and 9.5, respectively, while the second sample (n2 = 19) gave mean and standard deviation 100.9 and 11.5, respectively. The estimated standard error of the difference in sample means is______.

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