STATISTIC AND PROBABILITY

Question 1

6.A bag contains 5 red marbles and 3 blue marbles. What is the probability of picking a red marble at random?

Accepted Answer

b) 5/8

Question 2

4. If two events, A and B, are mutually exclusive, what is P(A and B)?

Accepted Answer

c) 0

Question 3

1. Which of the following is a measure of central tendency?

Accepted Answer

c) Mean

Question 4

19.In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?

Accepted Answer

b) 68%

Question 5

25.What is the most appropriate measure of central tendency for skewed data?

Accepted Answer

b) Median

Question 6

11.Which graph is best for displaying the distribution of a single categorical variable?

Accepted Answer

c) Bar Chart

Question 7

26.A coin is flipped 10 times. This involves which type of probability distribution?

Accepted Answer

c) Binomial distribution

Question 8

16.Which of the following is NOT a measure of dispersion?

Accepted Answer

c) Mode

Question 9

17.If the correlation coefficient between two variables is close to +1, it indicates:

Accepted Answer

b) A strong positive linear relationship

Question 10

9.What is the median of the following dataset: 7, 2, 9, 4, 6?

Accepted Answer

b) 6

Question 11

23.Which of the following is an example of a discrete variable?

Accepted Answer

c) Number of cars in a parking lot

Question 12

10.If P(A)=0.4 and P(B)=0.3 and A and B are independent events, what is P(A and B)?

Accepted Answer

b) 0.12

Question 13

14.What is the primary purpose of inferential statistics?

Accepted Answer

b) To make predictions or generalizations about a population based sample

Question 14

27.What is the difference between a permutation and a combination?

Accepted Answer

a) Permutations consider order, combinations do not.

Question 15

24.If P(A or B)=P(A)+P(B)−P(A and B), this is known as the:

Accepted Answer

c) Addition Rule

Question 16

28.If the standard deviation of a dataset is 0, what does this imply about the data?

Accepted Answer

a) All data points are the same.

Question 17

2.What is the probability of rolling an even number on a standard six-sided die?

Accepted Answer

c) 1/2

Question 18

5. Which of the following measures the spread of data around the mean?

Accepted Answer

c) Standard Deviation

Question 19

3. In a dataset, which value appears most frequently?

Accepted Answer

c) Mode

Question 20

20.What is the probability of drawing a king or a queen from a standard deck of 52 cards?

Accepted Answer

c) 8/52

Question 21

7.What type of variable can take on any value within a given range?

Accepted Answer

c) Continuous

Question 22

8.The sum of probabilities of all possible outcomes in an event space is always:

Accepted Answer

c) Equal to 1

Question 23

12.What is the range of the dataset: 12, 5, 18, 9, 20?

Accepted Answer

c) 15

Question 24

15.What is the probability of getting heads when flipping a fair coin twice in a row?

Accepted Answer

b) 1/4

Question 25

22.What does a p-value represent in hypothesis testing?

Accepted Answer

b) The probability of observing data as extreme as, or more extreme

Question 26

21.What is the name for a graphical representation of data that shows the frequency distribution using bars?

Accepted Answer

c) Histogram

Question 27

18.What is a sample?

Accepted Answer

b) A subset of the population chosen for study

Question 28

29.What is conditional probability?

Accepted Answer

a) The probability of an event occurring given that another event

Question 29

13.The complement of an event E, denoted E c , represents:

Accepted Answer

b) E not occurring

Question 30

30.Which of the following is a drawback of using the mean as a measure of central tendency?

Accepted Answer

b) It is affected by outliers.

STATISTIC AND PROBABILITY

Questions 30

STATISTIC AND PROBABILITY

Questions 30