Tag: random variable

Questions Related to random variable

State, which of the following variables are continuous and which are discrete :


Sizes of shoes is discrete
If true then enter $1$ and if false then enter $0$

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. $1$

  2. $0$

  3. Can't determine

  4. None of these

Show answer
Correct Option: A
Explanation:

Size of a shoe can have integer values only. Hence, it is a discrete variable.

Say true or false:
Daily temperature is discrete variable.

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Daily temperature can have any integer as well as rational values. Hence, it is a continuous variable.

Say true or false:

Sizes of the shoe are discrete variables.

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Size of shoe can have have only integer value. Hence, it is a discrete variable.

Are you a girl or boy is an example of ______ variable.

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. continuous

  2. dependent

  3. discrete

  4. nominal

Show answer
Correct Option: C
Explanation:

A discrete variable is a variable whose value is obtained by counting.
So, are you a girl or boy is an example of discrete variable.
Since it is answerable.

Which one of the statement is discrete variable?

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. weight of animals in zoo

  2. distance travelled between colleges

  3. number of heads by flipping a coins

  4. height of animals in park

Show answer
Correct Option: C
Explanation:

Discrete variables are countable in a finite amount of time.
So, number of heads when flipping a coin is a discrete variable statement because once the coin is flipped, we will get head or tail result.

The statement "number of heads when flipping a coin" is an example of ______ variable.

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. continuous

  2. dependent

  3. discrete

  4. nominal

Show answer
Correct Option: C
Explanation:

Discrete variables are countable in a finite amount of time.
So, number of heads when flipping a coin is a discrete variable statement because once the coin is flipped, we will get head or tail result.

Which variables are countable in a finite amount of time?

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. dependent

  2. continuous

  3. nominal

  4. discrete

Show answer
Correct Option: D
Explanation:

Discrete variables are countable in a finite amount of time.
Example: Count the number of people in your home.

How many times will you brush your teeth. The answer is an example of which type of variable?

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. continuous

  2. dependent

  3. nominal

  4. discrete

Show answer
Correct Option: D
Explanation:

A discrete variable is a variable whose value is obtained by counting.
So, how many times will you brush your teeth is countable.

______ is not a discrete variable.

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. average mark of a student

  2. what is your age?

  3. shoe size

  4. weight of a dog

Show answer
Correct Option: D
Explanation:

Weight of a dog is not a discrete variable.
Because, the weight of a dog is a continuous variable as it can take any value - for example, $2$ kg, $5$ kg, $4.2$ kg etc.

Teacher asked a student to state how many times in the last month they visited their family doctor. The answer is an example of which type of variable?

business mathematics and statistics random variable and mathematical expectation discrete and continuous data random variable random variable and its types

  1. continuous

  2. dependent

  3. discrete

  4. nominal

Show answer
Correct Option: C
Explanation:

A discrete variable is a variable whose value is obtained by counting.
So, here the student can able to say how many times he visited the doctor.
Therefore, the given statement is discrete.