Points: 1 of 2 Save hergy study found that household use of electricity had a mean of 682 and a standard deviation of 551 kilowatt-hours. Complete parts (a) and (b). here to view page 1 of the standard normal table. here to view page 2 of the standard normal table. uppose the distribution of energy use was normal. Using a table, calculator, or software that can give normal probabilities, find the proportion of households with electricity use greater than 1000 vatt-hours. proportion of households with electricity use greater than 1000 kilowatt-hours is . (Round to the nearest hundredth as needed.)