2. Question: The household energy consumption in Johor is normally distributed with a mean of 200 kWh and a standard deviation of 50 kWh. A random sample of 50 households is selected. Determine: i. the standard deviation of the sampling distribution X. ii. the probability of household energy consumption exceeding 200 kWh. iii. the probability of household energy consumption between 190 kWh and 210 kWh.

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