2. Electricity consumption: A company claims that the mean monthly residential electricity consumption in a . certain region is 800 kiloWat't-hours {kWh}. You want to test this claim. You find that a random sample of S4 resldential customers has a mean monthly consumption of 890 kWh. Assume the population standard deviation is 123 kWh. At a = 0.10, can you support the claim? NOTE: Parameter of interest: ,u = the true average monthly residential electricity consumption in a certain region. 3. Write the claim as a mathematical statement: b. Where Is the claim located? NULL HYPOTHESIS OR ALTERNATIVE HYPOTHESIS ' c. Write out the hypotheses (using correct symbols and notation): ci. What type of test Is this? LEFTTAILED . RIGHTTAILED . TWO-TAILED