Expected value of X

Let p denote the probability that a particular item A appears in a simple random sample (SRS). Suppose we collect 5 independent simple random samples, i.e., each SRS is obtained by drawing from the entire population. Let X denote the random variable for the total number of times that A appears in these 5 samples. What is the expected value of X, i.e., E[X]? Your answer should be in terms of p. What is V ar(X)? Again, your answer should be in terms of p.

“Struggling with a similar assignment?” We can help!!

How it works – it’s easy


Place your Order

Submit your requirements through our small easy order form. Be sure to include and attach any relevant materials.

Make a payment

The total price of your order is based on number of pages, academic level and deadline.


Writing process

We assign the assignment to the most qualified tutor. When the tutor completes the assignment, it is transferred to one of our professional editors to make sure that the assignment meets all of your requirements.

Once complete, we’ll send your assignment via the email provided on the order form.



Achieve academic succes with the best online tutors.