Statprob LT 1

Question 1

It is a variable whose possible values are determined by chance. It is typically represented by an upper case letter, usually x, while its corresponding lower case letter in the this case, x is used to represent one of its values

Answer 1

Random variable

Question 2

Can only take a finite(countable) number of distinct values.

Answer 2

discrete random variable

Question 3

Can assume an infinite number of values in an interval between two specific values.

Answer 3

Continuous Random variable

Question 4

Is a listing of all possible vales of a discrete random variable along with their corresponding probabilities.

Answer 4

Discrete probability distribution

Question 5

The probability of each value of a discrete random is between 0 and 1 inclusive

Answer 5

Case 1

Question 6

The sum of all probabilities is 1

Answer 6

Case 2

Question 7

It is a discrete random variable x is also called the expected value of x. it is weighted average of all values that the random variable X would assume in the long run. It is denoted by E(x)

Answer 7

Mean of a discrete random variable

Question 8

It is a discrete random variable x is the expected value of the square of the difference between assumed value of a random variable and the mean.

Answer 8

Variance of a discrete random variable

Question 9

The large the value of the variance, the father are the vales of x from the mean

Answer 9

True

Question 10

It is a discrete random variable x is the square root of the variance.

Answer 10

Standard deviation of a discrete random variable

Question 11

A game is fair if the expected value is?

Answer 11

0