Discrete random variable
Consider a discrete random variable X, with the following probability distribution.
X
0
1
2
4
8
Pr(X = X)
0.2
0.3
0.15
0.05
A) Find the mean E(X) for this variable.
B) Find E(X^2) for the variable X
C) Find the variance Var(X) for this variable.
Expected delivery within 24 Hours
A test charge (q0 = -2.20 x 10-8 C), with a mass of 2.80 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square.
When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 65.0 A. What is the magnitude of the larger of the two resistances?
The developers of the spam filter wish to reduce the probability in part B to 0.1%. What should the probability of the filter correctly identifying a spam email be increased to so that this objective is reached?
Help her address the charge of gender discrimination by finding the probability of getting 3 or fewer women when 24 people are hired, assuming that there is no discrimination based on gender.
If you have two 10 microfarad capacitors in series with each other, what is the equivalent capacitance of the combination?
An object is thrown vertically upward with a speed of 25.08mph. How much time from launch will it take to reach the bottom of a well 6.96 m deep?
The management of Gimenez Corporation is investigating an investment in equipment that would have a useful life of 7 years. The company uses a discount rate of 17% in its capital budgeting.
Now suppose that the wavelength of light is 125% larger than the slit separation. How many complete dark fringes would be seen on a distant screen?
1937658
Questions Asked
3,689
Active Tutors
1442595
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Protein is an essential part of our health as it forms building blocks for all of our cells, which then use amino acids to repair muscle, skin, organs, and bone
Review the information about Health Information Exchanges in the Niles (2024) textbook. Match the description to the term as best as you can
According to the Education and Care Services National Regulations, when children attend the service there must also be at least one staff
In Lesson, we discussed how to determine if there is a quality issue to measure and access. Meaning, once you have determined there is a quality problem
You have less than 10 minutes to identify the health and social concerns/needs and interventions you believe should be considered for Lorena
According to our textbook, lack of access to contraception negatively impacts women Why should contraception be a reproductive right?
In early childhood education and care services parents must always be fully informed in advance about anything that is provided for their child