Show transcribed image text random sample of 7 households selected from this city. Find the mean and standard deviation of city have an approximately normal distribution with a mean of $125 and a standard deviation of $25. Let I be the mean amount of electricity bils fo
random sample of 7 households selected from this city. Find the mean and standard deviation of city have an approximately normal distribution with a mean of $125 and a standard deviation of $25. Let I be the mean amount of electricity bils fo