Question

What is the expected value in statistics?

Answer 1

The expected value is also known as the expectation, mathematical expectation, EV, average, mean value, mean, or first moment. More practically, the expected value of a discrete random variable is the probability-weighted average of all possible values.

Answer 2

$\Large\boxed{\mathsf{SUBJECT: MATH}}$

Step-by-step explanation:

Expected value is the value the outcomes of an experiment will average to as the number of trials increases or as the experiment is repeated.

The expected value of an event is the value to expect after many trials.

It's given by E(X)= value * P(x₁) + value P(x₂) + value * P(x₃) + ..., where:

• The event, X, includes outcomes x₁, x₂, x₃, ..., xₙ.
• There is a numerical value associated with each outcome.

T=1

H=(-1)

E (tails)=(1)(1/2)+(-1)(1/2)=0