Assume that the readings on the thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A thermometer is randomly selected and tested. In each case, draw a sketch, and find the temperature reading corresponding to the given information.
In a certain region, annual household incomes are normally distributed. The middle 95% of the incomes are between $72,684 and $78,564. Find the mean and standard deviation of the annual household incomes for this region.