Probability

Probability is used as a basis for inferential statistics.

• True

• False

When the population of college professors is divided into groups according to their rank (instructor, assistant professor, etc.) and then several are selected from each group to make up a sample, the sample is called a cluster sample.

• True

• False

Selecting a Sweater At a men’s clothing store, 12 men

purchased blue golf sweaters, 8 purchased green

sweaters, 4 purchased gray sweaters, and 7 bought black sweaters. If a customer is selected at random, find the probability that he purchased a blue sweater

• a. 12/31

• b. 27/31

• c. 24/31

• d. 1

It is the sequence of events in which the first one has m_1 possibilities, the second has m_2, the third has m_3, and so on. the possible outcomes will be: m_1∙m_2∙m_3∙…∙m_n

• sample space

• fundamental counting principle

• event

The set of all possible outcomes of a probability experiment is called the _______________.

• simple event

• sample space

• event

• outcome

It is an event where one experiment happens at a time and it will be having a single outcome. It is also known as an elementary event.

• compound event

• simple event

• event

• sample space

Classify the given variable as discrete or continuous:

Ages of people working in a large factory

• discrete

• continuous

It is a type of probability that uses frequency distribution based on observations to determine numerical probabilities of events.

• subjective probability

• empirical probability

• classical probability

• probability

The group of all subjects under study is called a(n) (a)   .

A group of subjects selected from the group of all subjects under study is called a(n) (a)   .