The following table gives the data pertaining to kilowatt hours of electricity consumed in a month by 8 randomly selected flat owners in a building at a city 138 326 245 189 294 376 342 264 a....

Extracted text: The following table gives the data pertaining to kilowatt hours of electricity consumed in a month by 8 randomly selected flat owners in a building at a city 138 326 245 189 294 376 342 264 a. Determine the mean consumption of electricity. Answer in exact fraction, or rounded to at least 4 decimal places b. Determine the variance in the consumption of electricity. Answer in exact fraction, or rounded to at least 4 decimal places