How long will this package take to be delivered to me by FedEx ground?

Well i just ordered a laptop from dell on Friday the 11th. they shipped it yesterday and i just received the first tracking information this morning. It says it arrived at fed-ex location at Nashville Tennessee at 3:12 am mountain time (Arizona time zone). and after that it said it departed Fedex location Nashville Tennessee at 7:25 am mountain time. I live in gilbert, AZ. also the estimated delivery date was changed from 7/17 to 7/16. does anyone have an accurate idea on how long it will take for my package to get here?