# stats

## 57 terms

### data mining

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

### data warehousing

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

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

The subject of data mining deals with

### observations

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

### variable

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

### data set

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

### cases

Another name for "observations" is

### always numeric

Quantitative data

### qualitative variable

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

### elements

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

Qualitative data

Qualitative data

### only with quantitative data

Ordinary arithmetic operations are meaningful

### qualitative variable

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

### quantitative variable

Temperature is an example of

### Qualitative

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

### qualitative

Arithmetic operations are inappropriate for

### quanitive

Income is an example of

### crossectional data

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

### time series data

Data collected over several time periods are

### observational studies

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

### experimental studies

Statistical studies in which researchers control variables of interest are

### b. descriptive statistics

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

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

Statistical inference

### the population

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

### a sample

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

### descriptive statistics

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

### statistical inference

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

### sample

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)

### statistical inference

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

### descriptive statistics

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

### descriptive statistics

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

### statistical inference

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

### qualitative data

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

### could be larger, smaller, or equal to 22

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

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

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

### observation

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

### quantitative data

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

### quantitative data

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

### a data acquisition error

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

Census refers to

### is controlled

In experimental studies, the variable of interest

### is not controlled

In observational studies, the variable of interest

### 4

How many scales of measurement exist?

### interval and ratio

Which of the following can be classified as quantitative data?

The sample size

A population is

### 2.5%

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

### qualitative data

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

### census

A survey to collect data on the entire population is

### a value worksheet

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

### formula worksheet

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

### statistical inference

Refer to Exhibit 1-1. The city manager released a statement that 40% of Daisy City's 2,000 homes are in violation of city codes. The manager's statement is an example of

### sample

Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a

### only an approximation, since it is based upon sample information

Refer to Exhibit 1-1. The manager's statement that 40% of Daisy City's 2,000 homes are in violation of city codes is

### descriptive statistics

sample of 1,600 registered voters, 912, or 57%, approve of the way the President is doing his job.

74. Refer to Exhibit 1-2. The 57% approval is an example of

### statistical inference

Refer to Exhibit 1-2. A political pollster states: "Fifty-seven percent of all voters approve of the President." This statement is an example of

Example: