What is the p-value

What are you drinking? Environmental Protection Agency standards require that the amount of lead in -drinking water be less than 15 micrograms per liter Twelve samples of water from a particular source have the following concentrations, in units of micregrams per iter, Assume the population standard deviation a =5. If appropriate, perform a hypothess test to determine whether you can conclude that the mean concentration of lead meets the EPA standards. Use the a=0,05 level of significance and the P-value method with the T1-84 calculator. Part 1 of 6 Explain why it is necessary to check that the population is approximately normal before performing a hypothesis test It is necessary to check that the population is approsimstely normal because Part 2 of 6 following is a dotplot of the data. Is it reasonable to assume that the population is approximately normal? Ht reasonable to assume that the population is approximately normal. State the appropriate null and alternate hypotheses. H0H1 This hypothesis test is a test: Part 3/6 Part 4 of 6 Compute the Pivalue Round the Prvalue to at least four decimal places