Explain three solar homes reported monthly utility bills

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Reference no: EM13132823

Solar energy is considered by many to be the energy of the future. A recent survey was taken to compare the cost of solar energy to the cost of gas or electric energy. Results of the survey revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house using gas or electric energy had a mean of $92 and a standard deviation of $12. Three solar homes reported monthly utility bills of $55, $53, and $51. Which of the following statements is true? (Hint: Use the z-score.)

Reference no: EM13132823

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