Question

A study finds that in a certain neighborhood, the average daily consumption of electricity per household...

A study finds that in a certain neighborhood, the average daily consumption of electricity per household is 20 kWh, with Standard Deviation of 4 kWh. If there are 120 households in the neighborhood. What is the approximate probability that the total electricity consumption next Wednesday in this neighborhood exceeds 2500 kWh?

Part A,

What is the expected daily electricity consumption (in kWh) for the whole neighborhood?

Part B,

What is the variance in the daily electricity consumption of the whole neighborhood?

Part C,

What is the approximate probability that the total electricity consumption next Wednesday in this neighborhood exceeds 2500 kWh?

Math   Statistics-And-Probability   
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