Login
Login
Register
Questions
Unanswered
Tags
Categories
Ask a Question
Ask a Question
Recent questions tagged random variables
+1
vote
1
answer
If E(X+Y) =7 and E(X) =4, then find the value of E(Y).
asked
Mar 20, 2019
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+3
votes
1
answer
A *** has 6 faces marked by the given numbers as shown below: The *** is thrown once.
asked
Mar 8, 2019
in
Mathematics
by
kratos
class-11
random variables
probability
class-10
class-12
probability distributions
mathematical expectation
statistics
+2
votes
1
answer
If E(X) = 10 and SD (X) = 12, then find E(X^2 ).
asked
Feb 26, 2019
in
Mathematics
by
kratos
class-12
random variables
class-11
theoretical distribution
mathematical expectation
statistical inference
+2
votes
1
answer
If V(X) = 4 then find V(2X).
asked
Feb 17, 2019
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+1
vote
1
answer
State Multiplication of expectation.
asked
Feb 5, 2019
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+3
votes
1
answer
Write down the frequency density and relative frequency formulae.
asked
Jan 22, 2019
in
Mathematics
by
kratos
class-11
random variables
statistical quality control
mathematical expectation
class-12
+1
vote
1
answer
Find the mean and standard deviation for the following probability distribution.
asked
Jan 8, 2019
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+2
votes
1
answer
If X is a random variable and ‘a’ is any constant, then prove that E(ax) = aE(X) and var(ax) = a^2var(x).
asked
Dec 31, 2018
in
Mathematics
by
kratos
random variable
client side scripting using java script
class-11
random variables
probability
acet
mathematical expectation
class-12
+2
votes
1
answer
For the following probability distribution, find mean and variance.
asked
Dec 29, 2018
in
Mathematics
by
kratos
class-11
random variables
theoretical distribution
mathematical expectation
class-12
+2
votes
1
answer
If X is a random variable and E(X) =1.5, then what is the value of E(3 + 4X)?
asked
Dec 27, 2018
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+3
votes
1
answer
If E(X) = 3 and E(X^2 ) = 25, then find SD (X).
asked
Dec 24, 2018
in
Mathematics
by
kratos
class-11
random variables
theoretical distribution
mathematical expectation
class-12
statistical inference
+1
vote
1
answer
State Addition theorem expectation.
asked
Dec 15, 2018
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+1
vote
1
answer
In which probability distribution mean and variance are equal?
asked
Dec 8, 2018
in
Mathematics
by
kratos
class-11
random variables
theoretical distribution
mathematical expectation
class-12
+2
votes
1
answer
Suppose 10,000 tickets are sold in a lottery each for Re 1. First prize is of Rs 3000
asked
Dec 1, 2018
in
Mathematics
by
kratos
class-11
jee
random variables
probability
jee mains
mathematical expectation
+2
votes
1
answer
If E(x) = 3.5 E(y) = 2 and E(xy) = 8 find cov (x, y).
asked
Nov 23, 2018
in
Mathematics
by
kratos
analysis of univariate data
analysis of bivariate correlation
class-11
random variables
correlation
regression
mathematical expectation
regression analysis
+2
votes
1
answer
A fair coin is tossed repeatedly. If tail appears on first four tosses, then the probability of head appearing on fifth toss equals
asked
Nov 22, 2018
in
Mathematics
by
kratos
class-11
jee
random variables
probability
jee mains
mathematical expectation
class-12
bitsat
+2
votes
1
answer
If V(X) = 5 then find V(-5X).
asked
Nov 14, 2018
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+2
votes
1
answer
If E(X) = 2, find the value of E(3X – 6).
asked
Nov 12, 2018
in
Mathematics
by
kratos
mathematical expectation
class-11
random variables
+1
vote
1
answer
Define discrete variable and given example.
asked
Nov 11, 2018
in
Mathematics
by
kratos
random variable
class-11
random variables
scope
mathematical expectation
class-12
meaning
+1
vote
1
answer
What is correction between variables.
asked
Nov 10, 2018
in
Mathematics
by
kratos
class-11
mathematical expectation
classification and tabulation
random variables
To see more, click for the
full list of questions
or
popular tags
.