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.

We’re gonna need a picture to refer to in order to figure it out. try reposting your question with the picture included.