Statistics_Review Chapter 1

The entire collection of individuals or objects about which information is desired is called the ....................... of interest.

A ................... is a subset of the pop- ulation, selected for study in some prescribed manner.

The supervisors of a rural county are interested in the proportion of property owners who support the construction of a sewer system. Because it is too costly to contact all 7000 property owners, a survey of 500 owners (selected at random) is undertaken. What is the population in this scenario?

• The 500 property owners surveyed.

• The supervisors of the rural county

• All 7000 property owners in the county

• The construction workers for the sewer system.

The rural county supervisors are interested in the proportion of property owners who support the construction of a sewer system. Because it is too costly to contact all 7000 property owners, a survey of 500 owners (selected at random) is undertaken. What is the sample in this scenario?

• The 500 property owners surveyed.

• The supervisors of the rural county

• All 7000 property owners in the county

• The construction workers for the sewer system.

......................... statistics is the branch of statistics that includes methods for organizing and summarizing data.

.......................... statistics is the branch of statistics that involves generalizing from a sample to the population from which it was selected and assessing the reliability of such generalizations.

A univariate data set is .................... (or qualitative) if the individual observations are categorical responses.

Select one

• Categorical

• Cross-sectional

• Quantitative

A univariate data set is ............. (or quantitative) if each observation is a number.

In a survey of 100 people who had recently purchased motorcycles, data on the following variables was recorded:

Gender of purchaser

Brand of motorcycle purchased

Number of previous motorcycles owned by purchaser

The telephone area code of the purchaser

Which of these variables are categorical?

• Gender of purchaser

• Brand of motorcycle purchased

• Telephone area code of purchaser

In a survey of 100 people who had recently purchased motorcycles, data on the following variables was recorded:

Gender of purchaser

Brand of motorcycle purchased

Number of previous motorcycles owned by purchaser

The telephone area code of the purchaser

Weight of motorcycle as equipped at purchase

Which of these variables are discrete numerical?

• Gender of purchaser

• Brand of motorcycle purchased

• Telephone area code of purchaser

• Number of previous motorcycles owned by purchaser

• Weight of motorcycle as equipped at purchase