Question

Paula Pious is doing her budget. She discovers that the average miscellaneous expense is $65.00 with a standard deviation of $18.00. What percent of her expenses in this category would she expect to fall between $54.20 and $86.60?

Answer 1

z for $54.20 = -0.6 the percent of area associated with $54.20= 0.2743% the z for $86.60 = 1.2 the percent of area associated with $86.60 = 0.8849% Adding the two together, the percent of expense between $54.20 and $86.60 is 0.6106%