The null and alternate hypotheses are:
A random sampleof 15 observations from the first population revealed a sample meanof 350 and a sample standard deviationof 12. A random sample of 17observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the .10 significance level, is there a difference in the population means?
Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.