Monthly consumption of electricity X (in KWH, in a winter month) by the households in a county has a normal distribution with mean 875 KWH and standard deviation 155 KWH. What proportions of households consumes less than 1000 KW
Added by Harizz K.
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Step 1: Calculate the z-score using the formula z = (X - μ) / σ, where X = 1000, μ = 875, and σ = 155. Show more…
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Sarvesh S.
Monthly consumption of electricity X (in KWH, in a winter month) by the households in the county has a normal distribution with a mean of 875 KWH and a standard deviation of 155 KWH. What proportion of houses P(z < 406 875) consumes less than 1000 KWH? P(z < 0.806) = 0.7896. The monthly cell phone minutes used by an individual in the city has a normal distribution with a mean of 2700 minutes and a standard deviation.
David N.
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 the minimum and maximum "usual" amounts of electrical energy consumption. For one particular two-month period, the power company recorded consumption of 1365 kWh. Is that amount unusual? Minimum "usual" value =
Jacob F.
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