Data Exercise 3
Mortgages Approved	Frequency	P(X = xi)	xi * P(X = xi)	[xi - E(X)]2	[xi - E(X)]2*P(X = xi)
0	3
1	4
2	8
3	10
4	15
5	20
6	24
7	20
	Calculation	Result
Excercise 3a)	Expected Value
Excercise 3b)	Standard Deviation

Please help out for the expected value and standard deviration