According to the U.S. Department of Labor, the average American household spends $762 on personal care products and services per year. Suppose annual expenditures on personal care products and services per household are uniformly distributed between the values of $376 and $1,148. What are the standard deviation and the height of this distribution? What proportion of households spend more than $950 per year on household supplies? What proportion of households spend more than $1,200 per year on household supplies? What proportion of households spend between $475 and $600 on household supplies?