Question

Which describes the expected value:

A: the sum over all outcomes of the value of the outcome times the probability of the outcome
B: the level of confidence that a sample mean accurately represents a population mean
C: the population mean
D: the interval around the sample mean that you expect to contain the population mean

Answer 1

A : The sum over all outcomes of the value of the outcome times the probability of the outcome.

Step-by-step explanation:

Step-by-step explanation:-

Expectation:-Suppose a Random variable X assume the values x_{1} ,x_{2} ...............x_{n} with respective probabilities p_{1} ,p_{2} ,...........p_{n}.Then the expectation or expected value of X, denoted by E(x) , is defined as the sum of products of different values of x and the corresponding probabilities.

i.e., E(X) = Σ
`p_(i) x_(i)`