6.) The average delivery charge for a refrigerator is $54. The standard deviation is 53. Find the range in which at least 75% of the data values will fall.
1

$-6.97-$114.96

Using the invNorm function on the calculator, the range of 75% of the data values is $-6.97 to $114.96. In stats, not everything makes sense.

To use the invNorm function, go to 2nd vars, invNorm. Put .75 in the area, 54 in the mean, and 53 in the standard deviation.

A=bxh3.2x1.8=5.76 centimeters square