SOLUTION: 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 stabili

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!! 

RELATED QUESTIONS

A study of health care recorded the number of visits to a physician made by a person in a  (answered by stanbon)
Mathematicians have been searching for a formula that yields prime numbers.  One such... (answered by jim_thompson5910)
On the midnight shift, the number of patients with head trauma in an emergency room has... (answered by ikleyn)
A sequence of two different digits is randomly chosen from the digits 0-4; the first... (answered by math_tutor2020,greenestamps)
GRAPHICAL ANALYSIS OF DATA 

1. The list below shows the ages of the first 20 fans to... (answered by ikleyn)
30% of the population of  particular country favour the political party BNM.  Suppose... (answered by ewatrrr)
On the midnight shift, the number of patients with head trauma in an emergency room has... (answered by math_tutor2020)
Date	Amazon.com	Citigrou S&P500	Rf	
03/01/2012	179.03	28.26	1277.06	0.02	
04/01/2012... (answered by Fombitz,richwmiller)
I do know how to get the mean and the standard deviation sort of but not the median. (i... (answered by stanbon)