Probability and Probability Distribution

SECTION - A

1) Which of the following is an example of a random experiment?

A) A customer inspects a delivery and finds an error.

B) Marketing budgets a 10% increase in advertising.

C) The post office misplaces a letter.

D) A student increases her average study time/week and improves her grades.

2) The set of all possible outcomes from a random experiment is called the sample:

A) population.

B) space.

C) probability.

D) event.

3) Which of the following is not an example of a random experiment?

A) daily change of stock market index prices

B) customer makes a purchase or not

C) a survey to rate quality of service

D) coin-toss, heads or tails

4) The possible outcomes from a random experiment are called:

A) sample space.

B) parameters.

C) basic groups.

D) basic outcomes.

5) A subset of outcomes is defined as a(n):

A) sample.

B) event.

C) outcome.

D) probability.

6) When events have no common basic outcomes, they are said to be:

A) mutually exclusive.

B) mutually related.

C) mutually apart.

D) collectively exhaustive.

7) If the union of several events covers the entire sample space, it is said these events are:

A) mutually exclusive.

B) mutually related.

C) mutually apart.

D) collectively exhaustive.

8) The proportion of times that an event will occur, assuming that all outcomes in a sample space are equally likely to occur, is called:

A) objective probability.

B) classical probability.

C) relative frequency probability.

D) subjective probability.

9) ________ probability is the number of events in the population that meet the condition divided by the total number in the population.

A) Objective

B) Classical

C) Relative frequency

D) Subjective

10) The expression of an individual's degree of belief about the chance that an event will occur is called ________ probability.

A) objective

B) classical

C) relative frequency

D) subjective

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:

Suppose you roll a pair of dice. Let A be the event that you observe an even number. Let B be the event that you observe a number greater than seven.

11) What is the intersection of events A and B?

A) [8, 10, 12]

B) [7, 8, 9, 10, 11, 12]

C) [2, 4, 6, 8, 10, 12]

D) [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

12) What is the union of events A and B?

A) [8, 9, 10, 11, 12]

B) [8, 10, 12]

C) [2, 4, 6, 8, 9, 10, 11, 12]

D) [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

13) What is the complement of event A?

A) [8, 9, 10, 11, 12]

B) [3, 5, 7, 9, 11]

C) [1, 5, 10, 11, 12]

D) [8, 10, 12]

14) What is the complement of event B?

A) [3, 5, 7, 9, 11]

B) [2, 4, 6, 8, 10, 12]

C) [2, 3, 4, 5, 6, 7]

D) [7, 8, 9, 10, 11, 12]

15) What is B?

A) [9, 11]

B) [2, 3, 4, 6]

C) [5, 7, 8, 10, 12]

D) [3, 5]

16) What is A ?

A) [9, 11]

B) [8, 10, 12]

C) [3, 5, 7]

D) [2, 4, 6]

17) What is ?

A) [2, 4, 6]

B) [3, 5, 7]

C) [8, 9, 10, 11, 12]

D) []