company claims that the mean monthly residential electricity consumption in a certain region is more than kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of residential customers has a mean monthly consumption of kWh. Assume the population standard deviation is kWh. At , can you support the claim? Complete parts (a) through (e). (a) Identify and . Choose the correct answer below. A. : : (claim) B. : (claim) : C. : : (claim) D. : (claim) : E. : (claim) : F. : : (claim) (b) Find the critical value(s) and identify the rejection region(s). Select the correct choice below and fill in the answer box within your choice. Use technology. (Round to two decimal places as needed.) A. The critical values are nothing. B. The critical value is 2.33. Identify the rejection region(s). Select the correct choice below. A. The rejection regions are z and z. B. The rejection region is z. C. The rejection region is z.