Exam 1: Data and Statistics

Exhibit 1-1 In a recent study based upon an inspection of 200 homes in Daisy City, 80 were found to violate one or more city codes. -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

As one of its major contributions, statistics uses data from a sample to make estimates and test hypotheses about the characteristics of a population through a process referred to as

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

Census refers to

A survey to collect data on the entire population is

Temperature is an example of

Arithmetic operations are inappropriate for

The following information regarding the top eight Fortune 500 companies was presented in an issue of Fortune Magazine. Sales Sales Protits Profits Company \ Millions Rank \ Millions Rank General Motors 161,315 1 2,956 30 Ford Motor 144,416 2 22,071 2 Wal-Mat Stores 139,208 3 4,430 14 Exzon 100,697 4 6,370 5 General Electric 100,469 5 9,269 3 Int1 Business Machines 81,667 6 6,328 6 Citigroup 76,431 7 5,807 Philip Morris 57,813 8 5,372 9 Boeing 56,154 9 1,120 82 AT\&T 53,588 10 6.398 4 a. How many elements are in the above data set? b. How many variables are in this data set? c. How many observations are in this data set? d. Which variables are categorical and which are quantitative variables? e. What measurement scale is used for each variable?

Exhibit 1-5 The following is a frequency distribution of the monthly expenditures for long distance telephone service of 200 households in Chattanooga. $\begin{array}{|c|c|c|}\hline\text { Class } & \text { Expenditure \$) } & \text { \# of households } \\\hline 1 & 0 \text { and under } 20 & 42 \\\hline 2 & 20 \text { and under 40 } & 64 \\\hline 3 & 40 \text { and under } 60 & 34 \\\hline 4 & 60 \text { and under } 80 & 28 \\\hline 5 & 80 \text { and under } 100 & 20 \\\hline 6 & 100 \text { and over } & 12\\\hline\end{array}$ -Refer to Exhibit 1-5. What percentage of households have monthly expenditure for long distance service between $40 and $100?

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

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

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 an)

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

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

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

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

The following is a frequency distribution of the monthly expenditures for gasoline of 400 households in Chattanooga. $\begin{array}{|c|c|r|}\hline\text { Class } & \text { Expenditure \$) } & \text { \# of households } \\\hline 1 & 0 \text { and under } 20 & 84 \\\hline 2 & 20 \text { and under 40 } & 128 \\\hline 3 & 40 \text { and under } 60 & 68 \\\hline 4 & 60 \text { and under } 80 & 56 \\\hline 5 & 80 \text { and under } 100 & 40 \\\hline 6 & 100 \text { and over } & 24\\\hline\end{array}$ What is the cumulative relative frequency of the 3rd class?

Exhibit 1-3 Part of the data bank of a corporation is shown below. Employee Years of Employee Rank Number Gender Department Experience -) Yearly Salary 23450 Male Accounting 15 10 \ 52,443.00 34568 Female IT 24 7 \ 111,239.00 23123 Female Personnel 20 4 \ 84,473.00 23007 Male Finance 9 1 \ 47,519.00 -Refer to Exhibit 1-3. Gender is an example of data.

The process of conducting a survey to collect data for the entire population is called a

In observational studies, the variable of interest