A weighted average of the value of a random variable, where the probability function provides weights is known as
举一反三
- The function f(x) that defines the probability distribution of a continuous random variable X is a:
- Regarding the sample average and the population average, the following is correct ( ) A: Both are random variables B: Both are definite values C: The former is a certain value and the latter is a random variable D: The former is a random variable and the latter is a certain value
- 【单选题】The probability that a continuous random variable X will assume any specific value is: A. 0.0. B. 1.0. C. 0.50. D. any value between -0.5 and 0.5.
- In a continuous probability distribution, the random variable: A: is limited to certain values. B: may be any value within a certain range. C: may have a probability greater than 1.00. D: is discrete.
- A variable that can take on values at any point over a given interval is called _______. A: a value variable B: a continuous random variable C: a point variable D: a discrete random variable