Incomes in a Particular Market Area Are Known to Be

Multiple Choice

Incomes in a particular market area are known to be right-skewed with a mean equal to $33,100. In a report issued recently, a manager stated that at least 89 percent of all incomes are in the range of $26,700 to $39,500, and this was based on Tchebysheff's theorem. Given these facts, what is the standard deviation for the incomes in this market area?

A) Approximately $6,400
B) Approximately $3,200
C) Approximately $2,133
D) Approximately $4266