seconds. Question Completion Status: changes to this answer. 2 points Save Answer The National Energy Regulator of South Africa (NERSA) is the regulatory authority for the electricity supply industry in South Africa and claims that the mean monthly residential electricity consumption in your town is more than 874 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 64 residential customers has a mean monthly electricity consumption of 905 kWh. Assume the population standard deviation is 125 kWh. At 5% level of significance, do you have enough evidence to support the organisation's claim? Find the critical value(s) and identify the rejection region(s). (2)