Hi! This seems like a great place and everyone is so helpful sand I need some help so I came here. I'm in AP Statistics and this problem has me confused.
So, here is the problem-
Suppose 75% of all families spend more than $75 weekly for food, while 15% spend more than $150. Assuming the distribution of family expenditures on groceries is normal, what is the mean weekly expenditure and standard deviation?
I have no idea how to start it or anything, thanks for the help guys!