Exam 2: Graphs,charts and Tablesdescribing Your Data

A recent study of students at the university contained data on year in school and student age.An appropriate tool for analyzing the relationship between these two variables would be a joint frequency distribution.

There is no hard-and-fast rule regarding the number of classes that must be used when establishing a frequency distribution for a continuous variable.

A histogram can be used to display a joint frequency distribution between two quantitative variables.

Discuss the steps that you would use to manually construct a histogram for the salaries of the 1,124 employees in the Ferris Steel Company.

The Carter Department Store has data on the sales volume by department for the past 200 days.The data are in an Excel spreadsheet where column A represents the department name and column B represents the sales for that day in that department.In order to construct a bar chart that illustrates the difference in total sales by department for the 200 days,a required step in Excel will be 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 histogram would be useful for analyzing the relationship between miles driven and the age of the vehicle.

Which of the following is NOT true of a bar chart?

When choosing class boundaries for a frequency distribution,classes such as 60-70,70-80,80-90 would be acceptable.

A histogram can be created for discrete or continuous data.

Sawyer & Company is a law firm in Dallas,Texas.Recently,the administrative manager prepared a report for the managing partners that showed the number of court cases handled by the firm monthly over the past three years.It was appropriate for her to use a line chart in this case.

Recently a survey was conducted in which customers of a large insurance company were asked to indicate the number of speeding tickets they had received in the past three years.The minimum value in the data was zero and the largest was six tickets.If you wished to illustrate the proportion of people who had three or fewer tickets,you would most likely construct a cumulative relative frequency distribution.

A histogram can be constructed for data that are either quantitative or qualitative.

In forming the classes for a frequency distribution and histogram,suppose there were a number of empty classes.You should:

The city counsel has just voted to pass the city's budget for next year.If you were writing a report describing the budget so the citizens could understand how the total tax dollars will be spent,which of the following graphs might be most appropriate?

If you wish to construct a graph of a relative frequency distribution,you would most likely construct an ogive.

A stem and leaf diagram is used to:

The upper and lower limits of each class in a frequency distribution are also referred to as the data array.

A study was recently conducted by the regional electric and gas company.Data were collected for three customer categories showing the dollar amount of natural gas and the dollar amount of electricity consumed during the year.Which of the following graphs would most likely be used to display both sets of data together?

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

Suppose you are given the following data. If you wish to have a histogram with five classes,what should the first class limits be?