STA301 Quiz No.3 Shared by Zain ALi

Question # 1 of 10 ( Start time: 01:34:02 PM )  Total Marks: 1 
P[(X+Y) < 2] =? , where x=0, 1, 2 and y=0, 1, 2 
Select correct option: 
 f(0,0) + f(1,1) + f(1,0)
 f(0,1) + f(0,2) + f(2,0)
 f(0,0) + f(0,1) + f(1,0)
 f(0,0) + f(1,1) + f(2,0)


Question # 2 of 10 ( Start time: 01:35:11 PM )  Total Marks: 1 
Consider the probability function P(x)={6-(x-7)}/36 for x = 2,3,...,12. What is the P(6<X<8)? 
Select correct option: 
 5/36
 6/36
 10/36
 16/36


Question # 4 of 10 ( Start time: 01:38:02 PM )  Total Marks: 1 
In hyper geometric distribution probability of success always: 
Select correct option: 
 is constant from trial to trial
 Varies from trial to trial
 sometimes varies and sometimes is constant
 None of the above


Question # 6 of 10 ( Start time: 01:40:21 PM )  Total Marks: 1 
Mean and variance of a Poisson Distribution are: 
Select correct option: 
 Equal
 Not equal
 Mean is greater than variance
 Variance is greater than mean


Question # 7 of 10 ( Start time: 01:41:28 PM )  Total Marks: 1 
The joint density function f(x,y) will be a pdf if 
Select correct option: 
 Both of integrals f(x,y) dx dy =1    
 Both of integrals f(x,y) dx dy >1   
 Both of integrals f(x,y) dx dy <1   
 Both of integrals f(x,y) dx dy =0  


Question # 9 of 10 ( Start time: 01:44:07 PM )  Total Marks: 1 
If E(x) = 1.5 then E(2X+3)=.....: 
Select correct option: 
 3
 2
 1.5
 6