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Mathematics, 18.04.2020 03:05 Nannie60

According to the U. S. Department of Labor, the average American household spends $639 on household supplies per year. Suppose annual expenditures on household supplies per household are uniformly distributed between the values of $251 and $1,027.
(a) What is the standard deviation of this distribution?
(b) What is the height of this distribution?
(c) What proportion of households spend more than $870 per year on household supplies?
(d) What proportion of households spend more than $1,290 per year on household supplies?
(e) What proportion of households spend between $380 and $490 on household supplies?

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