STA301 Quiz No.3 Shared by Uzma

Question # 1 of 10 ( Start time: 10:43:41 PM ) Total Marks: 1
If X and Y are two discrete r.v’s with joint probability function f(x,y), then the conditional probability function Y given X, f(y|x) is given by
Select correct option:
f(yj | xi) = f(xi, yj) / g( xi)
f(yj | xi) = f(xi, yj) / h( yj)
f(yj | xi) = f(xi, yj) / Sum of g( xi)
f(yj | xi) = f(xi, yj) / sum of h( yj)


Question # 2 of 10 ( Start time: 10:44:47 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 # 3 of 10 ( Start time: 10:45:14 PM ) Total Marks: 1
x 0 1 2 3 f (x) 0.26 0.49 0.22 0.02 From the above table, the expected value will be equal to:
Select correct option:
0.81
0.71
0.99
0.79


Question # 4 of 10 ( Start time: 10:46:29 PM ) Total Marks: 1
If one event is not affected by the outcome of the other event, the two events are said to be:
Select correct option:
Dependent
Not Mutually Exclusive
Mutually Exclusive
Independent


Question # 5 of 10 ( Start time: 10:46:54 PM ) Total Marks: 1
If P(X=x)=0, then f(x) is a __________ probability function.
Select correct option:
Univariate
Bivariate
Continuous
Discrete


Question # 6 of 10 ( Start time: 10:47:30 PM ) Total Marks: 1
The moment ratios b1 and b2 of normal distribution are:
Select correct option:
0 and 1
0 and 2
0 and 3
0 and 4


Question # 7 of 10 ( Start time: 10:48:50 PM ) Total Marks: 1
From the following table, x 0 1 2 3 f (x) 0.26 0.49 0.22 0.02 E (2X+1) will be:
Select correct option:
2
1.98
2.98
0.99


Question # 8 of 10 ( Start time: 10:49:41 PM ) Total Marks: 1
Using the normal approximation to the binomial distribution with n= 3 and p= 0.0571 the value of mean is:
Select correct option:
0.1713
0.2132
0.5133
0.1923


Question # 9 of 10 ( Start time: 10:50:31 PM ) Total Marks: 1
According to emperical rule how much data lies between mean - 1(Sigma) and mean + 1(sigma).
Select correct option:
68.26%
99.73%
75.66%
95.44%


Question # 10 of 10 ( Start time: 10:51:19 PM ) Total Marks: 1
What are the number of parameters of Hyper geometric distribution ?
Select correct option:
2
5
4
3