In reporting the results of a study to compare two population means, explain why researchers should report

Question:

In reporting the results of a study to compare two population means, explain why researchers should report each of the following:
a. A confidence interval for the difference in the means.
b. A p-value for the results of the test, as well as whether it was one- or two- sided.
c. The sample sizes used.
d. The number of separate tests they conducted during the course of the research.