Question 993831: 1 2, 3, 4, 5, 6 NUMBERS OF PERSONS
.41, .30, .14, .11, .03, .01 RENT STABILIZED
Q. What is the variance of the number of person living in each unit?
rent stabilized?
So the way i tried was
(1^2)(0.41)+(2^2)(0.30)+(3^2)(0.14)+(4^2)(.11)+(5^2)(.03)+(6^2)(.01) =5.74
variance = E(x^2)-[E(x)]^2 = 5.74-(2.08)^2 = 1.1436 as my answer but it shows incorrect.
Can you please help me identify where i am wrong or is my answer put in different? Please help with answer. THanks
Answer by MathTherapy(10552)   (Show Source):
You can put this solution on YOUR website!
1 2, 3, 4, 5, 6 NUMBERS OF PERSONS
.41, .30, .14, .11, .03, .01 RENT STABILIZED
Q. What is the variance of the number of person living in each unit?
rent stabilized?
So the way i tried was
(1^2)(0.41)+(2^2)(0.30)+(3^2)(0.14)+(4^2)(.11)+(5^2)(.03)+(6^2)(.01) =5.74
variance = E(x^2)-[E(x)]^2 = 5.74-(2.08)^2 = 1.1436 as my answer but it shows incorrect.
Can you please help me identify where i am wrong or is my answer put in different? Please help with answer. THanks
I got variance as:  , which is what you should have gotten, but you seem to have copied the wrong value. You see,  , not 1.1436 as you posted. I hope this helps!!
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