question

Methods for developing useful decision-making information from large data bases is known as

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data mining

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The process of capturing, storing, and maintaining data is known as

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data warehousing

question

The subject of data mining deals with

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methods for developing useful decision-making information from large data bases

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In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of the

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nominal scale

question

The nominal scale of measurement has the properties of the

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None of these alternatives is correct.

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The scale of measurement that is used to rank order the observation for a variable is called the

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ordinal scale

question

Some hotels ask their guests to rate the hotel's services as excellent, very good, good, and poor. This is an example of the

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ordinal scale

question

The ordinal scale of measurement has the properties of the

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nominal scale

question

The ratio scale of measurement has the properties of

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the interval scale

question

Temperature is an example of a variable that uses

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the interval scale

question

The interval scale of measurement has the properties of the

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None of these alternatives is correct.

question

Arithmetic operations are inappropriate for

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the nominal scale

question

Income is an example of a variable that uses the

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ratio scale

question

Data obtained from a nominal scale

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can be either numeric or nonnumeric

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The scale of measurement that has an inherent zero value defined is the

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ratio scale

question

Arithmetic operations are appropriate for

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None of these alternatives is correct

question

Quantitative data refers to data obtained with a(n)

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either interval or ratio scale

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Data

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are the raw material of statistics

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The entities on which data are collected are

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elements

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The set of measurements collected for a particular element is (are) called

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observations

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A characteristic of interest for the elements is called a(n)

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variable

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All the data collected in a particular study are referred to as the

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data set

question

Another name for "observations" is

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cases

question

Quantitative data

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are always numeric

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In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of a

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categorical variable

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The number of cases will always be the same as the number of

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elements

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Categorical data

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may be either numeric or nonnumeric

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Categorical data

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are labels used to identify attributes of elements

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Ordinary arithmetic operations are meaningful

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only with quantitative data

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Social security numbers consist of numeric values. Therefore, social security is an example of

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a categorical variable

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Temperature is an example of

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a quantitative variable

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For ease of data entry into a university database, 1 denotes that the student is an undergraduate and 2 indicates that the student is a graduate student. In this case data are

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categorical

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Arithmetic operations are inappropriate for

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categorical data

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Income is an example of

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categorical data

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Data collected at the same, or approximately the same, point in time are

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crossectional data

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Data collected over several time periods are

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time series data

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Statistical studies in which researchers do not control variables of interest are

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observational studies

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Statistical studies in which researchers control variables of interest are

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experimental studies

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The summaries of data, which may be tabular, graphical, or numerical, are referred to as

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descriptive statistics

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Statistical inference

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is the process of drawing inferences about the population based on the information taken from the sample

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The collection of all elements of interest in a particular study is

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the sampling

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A portion of the population selected to represent the population is called

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a sample

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In a sample of 800 students in a university, 240, or 30%, are Business majors. The 30% is an example of

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descriptive statistics

question

In a sample of 400 students in a university, 80, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of

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statistical inference

question

Five hundred residents of a city are polled to obtain information on voting intentions in an upcoming city election. The five hundred residents in this study is an example of a(n)

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sample

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A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 24 years. This is an example of

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statistical inference

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The owner of a factory regularly requests a graphical summary of all employees' salaries. The graphical summary of salaries is an example of

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descriptive statistics

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The Department of Transportation of a city has noted that on the average there are 17 accidents per day. The average number of accidents is an example of

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descriptive statistics

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The process of analyzing sample data in order to draw conclusions about the characteristics of a population is called

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statistical inference

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In a post office, the mailboxes are numbered from 1 to 4,500. These numbers represent

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categorical data

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The average age in a sample of 190 students at City College is 22. As a result of this sample, it can be concluded that the average age of all the students at City College

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could be larger, smaller, or equal to 22

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Since a sample is a subset of the population, the sample mean

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can be larger, smaller, or equal to the mean of the population

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The scale of measurement that is simply a label for the purpose of identifying the attribute of an element is the

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nominal scale

question

In a data set, the number of elements will always be the same as the number of

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observations

question

Which of the following is not a scale of measurement?

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primal

question

Which of the following is a scale of measurement?

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ratio

question

Which of the following variables use the ratio scale of measurement?

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nominal

question

Which of the following variables use the ratio scale of measurement?

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income

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The weight of a candy bar in ounces is an example of

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quantitative data

question

The height of a building, measured in feet, is an example of

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quantitative data

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An interviewer has made an error in recording the data. This type of error is known as

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a data acquisition error

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Census refers to

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a survey to collect data on the entire population

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In experimental studies, the variable of interest

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is controlled

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In observational studies, the variable of interest

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is not controlled

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How many scales of measurement exist?

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4

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Which of the following can be classified as quantitative data?

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interval and ratio

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The sample size

answer

is always smaller than the population size

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A population is

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the collection of all items of interest in a particular study

question

In a random sample of 200 items, 5 items were defective. An estimate of the percentage of defective items in the population is

answer

2.5%

question

On a street, the houses are numbered from 300 to 450. The house numbers are examples of

answer

categorical data

question

A survey to collect data on the entire population is

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a census

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In Excel, a worksheet that displays the data for the problem and shows the results of the analysis is

answer

a value worksheet

question

In Excel, a worksheet that displays the formulas used to create the results is a

answer

formula worksheet

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