The mean of electrical energy consumption amounts for a home during a​ two-month period is 2417 ​kWh, and the standard deviation is 521 kWh. Use the range rule of thumb to identify minimum and...

The mean of electrical energy consumption amounts for a home during a​ two-month period is

​kWh, and the standard deviation is

kWh. Use the range rule of thumb to identify minimum and maximum​ "usual" amounts of electrical energy consumption. For one particular​ two-month period, the power company recorded consumption of

kWh. Is that amount​ unusual?

minimum​ "usual"