IEE 380 Exam 1 practice test Questions with Correct Answers Latest Update

IEE 380 Exam 1 practice test Questions with Correct Answers Latest Update you are required to use a TI-89 - Answers False graph of F(x) = P(X = x) when X is the face value for the throw of a fair die? - Answers x on x-axis F(x) on y-axis open step function for graph The entry in the Z table (CDF of a standard normal random variable) corresponding to a row label of 1.2 and a column label of .03 is - Answers P(Z = 1.23) / phi(1.23) If random variable X has a/an _______________ number of values in a finite interval of its range, X is continuous. - Answers infinite The CDF is the probability that a random variable, X, is _______________ to a specific number, x. - Answers less than or equal to on a graph of the standard normal variable f(z) is on the y-axis - Answers false, f(x) ******Let x (lowercase) denote a specific measured numerical value of a random variable. How do we denote this random variable? That is, what is the notation of the random variable? - Answers P(X=x) Open the text to section 3.6 and look at Example 3-16 Digital Channel. This example was part of your reading assignment for the week. Which of the following is the correct definition of the random variable in this example? - Answers X is the random variable and it is the number of bits received in error out of the next four that are transmitted. ******Suppose the pdf of X is given as f(x) = .25 for 3 x 8 How many numerical values can X be? - Answers 5 ******How many values can a Poisson random variable have? - Answers n Let P(X=x) be the probability that a random variable equals a specific measured numerical value, x. Let p(x) denote the probability mass function of that random variable, X. Is this relationship True or False: P(X=x) = p(x) - Answers true If Y is the face value for the throw of a fair die, then the equation ((b-a+1)^2 - 1)/12 is the ______________ of Y. - Answers variance A normally distributed random variable that has a mean equal to 0 and a standard deviation equal to 1 is called _____________ - Answers A standard Normal Random Variable, AKA Z X is the face value for the throw of a fair die. What is the expected value of X? - Answers 3.5 X is a continuous random variable of "int( f(x)dx ) from low x to general x" is - Answers the CDF of x *****Suppose X has the pdf 3e^(-3x) for x 0. (This is called the Exponential pdf.)