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Question: Suppose someone who knows 60% of the material covered in a chapter of a textbook is taking a five question objective (each answer is either right or wrong, not multiple choice or true-false) quiz. Let X be the random variable that for each possible quiz, gives the number of questions the student answers correctly. What is the expected value of the random variable X - 3? What is the expected value of (X - 3)2? What is the variance of X?
Let (P) be the plane x+2y-z=0. Let T be the reflection in R3 about (P). a) Derive an orthogonal basis B = {b1,b2,b3} for the space R3,such that b1 = n is a normal vector to the plane (P), while b2, b3 are on the plane (P).
Explain whether we can we say there is a difference between the population proportions in this situation.
T est to see if the mean of the population is at least twelve ounces.
A shelf of books at the bookstore has 4 different detective novels, 5 different science fiction books, and 4 different spy novels. If John selects 3 of these at random, how many different outcomes are possible?
Find the work done pulling the bucket to the top of the well. Your answer must include the correct units. (You may enter lbf or lb*ft for ft-lb.)
Develop a Racket program that provides definitions for the following functions. A function that returns the greatest common divisor of two integers
Differentiate the functions. y = (square root cos (square root x))
Write down the fixed-end boundary conditions at x = 0 and x = 1 for the displacement u(x,t), and then deduce the boundary conditions for the functionF(x).
A study of 35 golfers showed that their average score on a particular course was 92.The standard deviation of the sample is 5.
Radioactivity is always dangerous (T/F) F Bananas have radioactivity (T/F) T Radioactivity is a nuclear process (T/F) F
A cube with sides 2 inches long is covered with a ?berglass coating .06 inches thick. Estimate the volume of the ?berglass shell.
The price of a baseball ticket at Yankee Stadium is 2·1/4 times the original price of a ticket at $60. What is the price of the ticket today
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