Stats test 2
What are the two key properties of a discrete probability distribution?
0≤P (X = x) ≤1 and ∑P (X = xi ) = 1
Which of the following can be represented by a continuous random variable?
The average temperature in Tampa, Florida, during the month of July
Which of the following can be represented by a discrete random variable?
The number of defective light bulbs in a sample of five
Which of the following can be represented by a discrete random variable?
The number of obtained spots when rolling a six-sided die
We can think of the expected value of a random variable X as ________.
the long-run average of the random variable values generated over infinitely many independent repetitions
The expected value of a random variable X can be referred to or denoted as _________
the population mean, E(X), µ