- Part (a) State the null hypothesis. H0:m=e H0:me H0:m<e H0:me Part (b) Part (c) Part (d) State the distribution to use for the test. (Enter your answer in the form z or tdf where df is the degrees of freedom. Round your answer to two decimal places.) x Part (e) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.) -- Select-- V= Part(f) What is the p-value? (Round your answer to four decimal places.) Explain what the p-value means for this problem. If H0 is false, then there is a chance equal to the -value that the sample mean salary of mechanical engineers is $300 more than the sample mean salary of electrical engineers. If H0 is true, then there is a chance equal to the p-value that the sample mean salary of mechanical engineers is $300 more than the sample mean salary of electrical engineers. If H0 is true, then there is a chance equal to the p-value that the sample mean salary of mechanical engineers is at least $300 less than the sample mean salary of electrical engineers. If H0 is false, then there is a chance equal to the p-value that the sample mean salary of mechanical engineers is at least $300 less than the sample mean salary of electrical engineers..