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
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
举一反三
- Time series and variable series（ ）. A: Are arranged in chronological order B: Are arranged according to the size of the variable value C: The former is arranged according to chronological order, the latter is arranged according to the size of the variable value D: The former is arranged according to the size of the variable value, the latter is arranged according to the chronological order
- A weighted average of the value of a random variable, where the probability function provides weights is known as
- 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
- 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.
- In the complimentary close, which word should be capitalized? ______. A: Both B: Neither C: The former D: The latter