Okay so I know to find the IQR is Q3-Q1 I did that but got the question wrong.
How do I find the IQR when the only info I have is 80=mean and 20=standard deviation?????
Because I need the median???
The whole question was:
Costs for standard veterinary services at a local animal hospital follow a Normal Model with a mean of $80 and a standard deviation of $20.
Part A was to draw the model : which I did and got right
Part B was : Is it unusual to have a veterinary bill for $125? Explain : Which I did and got right....answer was Yes because only 1.2% of bills cost $125 or higher.
Part C was : What is the IQR for the costs of standard veterinary services? Show your work.
Thank you for helping me!!
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