Exam 2: Graphs, Charts and Tablesdescribing Your Data

In constructing a frequency distribution for the savings account balances for customers at a bank, the following class boundaries might be acceptable if the minimum balance is $5.00 and the maximum balance is $18,700: $0.00 - $5,000 $5,000 - 10,000 $10,000 - $15,000 $15,000 - $20,000

An ogive is a graph that shows cumulative relative frequency.

A joint frequency distribution can be constructed for either quantitative or qualitative data.

A stem and leaf diagram is used to:

In a study involving car owners, one question asked the owner for the number of miles driven last year. A second question asked the owner for the age of the vehicle. A joint frequency distribution would be useful for determining whether newer cars tend to be driven more miles than older cars.

In a study involving car owners, one question asked the owner for the number of miles driven last year. A second question asked the owner for the age of the vehicle. A histogram would be useful for analyzing the relationship between miles driven and the age of the vehicle.

In Excel a joint frequency distribution table can be created using a tool called PivotTable.

A homeowners association consists of 20 homes. The family in each home is considered an automatic member of the association. Recently, one of the homes fell into a state of disrepair. A survey was conducted of the homeowners both on the same street as the house in question and on the second street. At issue was whether legal action should be brought against the homeowner with the problem house. There are 8 homes on the same street as the problem house and 6 of these called for legal action. The percentage of houses on the second street that favored legal action is 50 percent. Which type of chart might be most effective for conveying the information about percentage of residents favoring legal action by street?

Frequency distributions are specifically for analyzing discrete data.

Bar charts can show either frequency or percentage.

On a scatter diagram, the independent variable should be placed on the horizontal axis and the dependent variable should be placed on the vertical axis.

Which of the following questions CANNOT be answered using a scatter diagram?

If you have constructed a joint frequency distribution manually and now wish to convert it to a joint relative distribution, the proper method is to divide each cell frequency by the cell's row total.

An ogive is a graph of a joint frequency distribution.

A histogram is most commonly used to analyze which of the following?

A study of 2000 Verizon cellphone customers listed the annual incomes of the customers as well as other variables. The lowest income was $25,000 and the highest income was $145,000. To develop a frequency distribution with 6 classes, the smallest value that the class width can be is 20K.

A bar chart is most likely used to display which of the following?

In Excel, joint frequency distributions can be generated using the Pivot Table feature under the Data tab.

The following class limits would be acceptable for developing a frequency distribution on income: $0 < $5,000 $5001 < $10,000 $10,001 < $20,000 Over $20,000

The Fitness Center manager has collected data on the number of visits to the club each week for the past 8 weeks. These data are shown as follows. Which of the following statements is most correct?