Urgent Help - Average number of days

[htalat6]

Hey champs,
I need some advice how to solve this situation.
I  want to show average number of days a ticket stayed in a particular status. Values of this matrix i average of days / status

	jan	feb	mar	APRIL	MAY	JUNE	JULY	AUG	SEP
STATUS1
STATUS2
STATUS 3

Problem statement:

What if there are 10 issues and 9 issues took 30 days where as 1 issue took just 2 days. so average of this will be 3 days. What way i can show the variance too? 
i am using PBI desktop RS