Question
Asked Nov 9, 2019
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Solve the problem. Round to the nearest tenth unless indicated otherwise.
11) In one region, the September energy consumption levels for single-family homes are found to be normally
distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. Find P45, which is the consumption
level separating the bottom 45% from the top 55%
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Solve the problem. Round to the nearest tenth unless indicated otherwise. 11) In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of 1050 kWh and a standard deviation of 218 kWh. Find P45, which is the consumption level separating the bottom 45% from the top 55%

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Expert Answer

Step 1

It is given that the energy consumption levels for single family homes are normally distributed with a mean 1050kWh and a standard deviation of 218 kWh.

 

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That is, 1050 and o 218

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Step 2

11.

We need to find critical value at 44th percentile, which is the consumption level separating the bottom 45% from the top 55%.

Using Excel formula, one can obtain the critical value at  44th percentile.

 The Exc...

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fNORM.S.INV(0.45) A1 A В C F -0.12566 LL

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