Question 1

Which one of the following is discrete data?

Accepted Answer

Ana has two brothers and one sister.

Answer

Ana weighs 50 kg.

Answer

Ana ran 100 meters in 15 seconds.

Answer

Ana is 150 cm tall

Question 2

Which of these is continuous variable?

Accepted Answer

The distance that a cyclist rides each year

Answer

The number of mangoes produced by my mangoes tree each year

Answer

The number of people that it would take to paint a house

Answer

Number of texts you send each day

Question 3

Which one of the following is discrete data?

Accepted Answer

number of death per day attributed to COVID 19

Answer

time needed to finish the test

Answer

speed of a car

Answer

amount of sugar in a cup

Question 4

Consider the following discrete probability distribution, what is the sample space of the experiment?

Accepted Answer

{0, 1, 2, 3, 4}

Answer

{0.1, 0.15, 0.2, 0.25}

Answer

{0, 1, 2, 3}

Answer

{0.1, 0.15, 0.2, 0.25, 0.3}

Question 5

What are the sample points associated to 0.1 ≤ P(X) ≤ 0.3?

Accepted Answer

{0, 1, 2, 3, 4}

Answer

{1, 2, 3, 4}

Answer

{0, 1, 2, 3}

Answer

{1, 3}

Question 6

What are the sample points associated to P(X) ≤ 0.2?

Accepted Answer

{1, 2, 3}

Answer

{1, 2}

Answer

{1}

Answer

{2, 3}

Question 7

Suppose two balls are drawn in succession without replacement from an urn containing 5 red balls and 6 blue balls. Which is a possible value of the random variable for the red balls?

Accepted Answer

2

Answer

3

Answer

4

Answer

5

Question 8

Suppose two balls are drawn in succession without replacement from an urn containing 5 red balls and 6 blue balls. What is the sample space?

Accepted Answer

S = {RR, RB, BR, BB}

Answer

S = {RRR, RBR, BRR, BBB, RRB}

Answer

S = {RR, RB, BR, BBR}

Answer

S = {RR, RB, BR}

Question 9

Suppose two balls are drawn in succession without replacement from an urn containing 5 red balls and 6 blue balls. If X be the random variable representing the blue balls, what is the value of X?

Accepted Answer

X = {0, 1, 2}

Answer

X = {1, 2, 3, 4}

Answer

X = {0, 1, 2, 3, 4}

Answer

X = {1, 2, 3}

Question 10

Suppose four coins are tossed simultaneously and the number of heads are recorded. Let X be the number of head appeared. If your task is to find the number of head appeared, what is the first step you will do?

Accepted Answer

Determine the sample space

Answer

All of these

Answer

Count the number of heads in each outcome in the sample space.

Answer

Assign a number for this outcome

Question 11

What is the term used for the set of all possible outcomes in an experiment?

Accepted Answer

Sample Space

Answer

Random Variable

Answer

Statistics

Answer

Variable

Question 12

Which of the statements refers to discrete random variable?

Accepted Answer

A discrete random variable has a countable number of possible values.

Answer

A discrete random variable has a measurable number of possible values.

Answer

A discrete random variable has a number of possible values.

Answer

A discrete random variable has an infinite number of possible values.

Question 13

Which of the following doesn't belong to the group?

Accepted Answer

The distance between two persons

Answer

The number of defective light bulbs

Answer

The Friday-night attendance in a cinema

Answer

Number of patients a doctor sees in a day

Question 14

Which of the following variables can assume only a finite number of values and can be determined by simply counting?

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Answer

Pay off Value

Answer

Discrete Probability Distribution

Question 15

You have a bag containing 3 red chips and 6 white chips and you draw 4 chips. Let random variable Y be the number of red chips drawn from the bag out of 4 draws without replacement. Find the values of the random variable Y.

Accepted Answer

Y = {0, 1, 2, 3}

Answer

Y = {1, 2, 3, 4, 5}

Answer

Y = {0, 1, 2, 3, 4}

Answer

Y = {1, 2, 3, 4}

Question 16

What is the sample space suppose two coins are tossed?

Accepted Answer

{HH, HT, TH, TT}

Answer

{HHH, TTT, HHT, HTH, HTT, THH, THT, TTH}

Answer

{H, T}

Answer

{HH, TT}

Question 17

A couple has four children. Let "b" = the number of boys they have. What are the possible instances of "b"?

Accepted Answer

{0, 1, 2, 3, 4}

Answer

{0, 1, 2, 16}

Answer

{1, 2, 3, 4}

Answer

{boy, girl}

Question 18

Given a tray with 30 eggs. Let X be the random variable for the number of rotten egg. What are the possible values of random variable?

Accepted Answer

X = 0, 1, 2, 3, … 30

Answer

X = 1, 2, 3, 4, … 30

Answer

X ≤ 0

Answer

X ≥ 0

Question 19

If two coins are tossed, which is not a possible value of the random variable for the number of tails?

Accepted Answer

3

Answer

1

Answer

2

Answer

0

Question 20

Let set A = {1, 2, 3, 4} and set B = {2, 3, 5, 7}. One number is chosen at random from each set and their sum is calculated. What is the probability that this sum is less than 6?

Accepted Answer

5/16

Answer

1/3

Answer

5/8

Answer

3/8

Related quizzes

Related quizzes