Question

Fill in the missing information. Tim Worker is doing his budget. He discovers that the average miscellaneous expense is $45.00 with a standard deviation of $16.00. What percent of his expense in this category would he expect to fall between $38.60 and $57.80? The z for $38.60 = -. The percent of area associated with $38.60 = % The z for $57.80 = . The percent of area associated with $57.80 = % Adding the two together, the percent of his expenses between $38.60 and $57.80 is %

Answer 1

Answer:

1) .4

2) 15.5

3) .8

4) 28.8

5) 44.3

Answer 2

The z for $38.60 = (38.60 - 45)/16 = -0.4

The percent of area associated with $38.60 = P(z < -0.4) = 0.34458 =34.46%

The z for $57.80 = (57.8 - 45)/16 = 0.8.

The percent of area associated with $57.80 = P(z < 0.8) = 0.78814 = 78.81%

the percent of his expenses between $38.60 and $57.80 is (78.81 - 34.46) = 44.35%