Exam 2: Graphs,Charts and Tablesdescribing Your Data

After developing a frequency distribution for a quantitative variable,a histogram can be developed with the horizontal axis representing the values of the variable and the vertical axis representing the frequency of occurrence in each class or group.

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.

Consider a situation in which both a frequency distribution and a relative frequency distribution have been developed for the same quantitative variable.If histograms are constructed from each distribution,the graphs will appear to have the same shape.

In constructing a stem and leaf diagram,there is a hard-and-fast rule for defining the stem and the leaves.

Once you have determined the class width using the formula,high-low divided by the number of classes,it is appropriate to round to the nearest integer to make the analysis easier.

An ogive is a graph of a joint frequency distribution.

Which of the following CANNOT be shown effectively with a histogram?

The difference between bar charts and histograms is that bar charts always show percentage while histograms always show frequency.

One of the advantages that a stem and leaf diagram has over a histogram is:

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.

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.One of the objectives of graphing these data might have been to identify a trend in the number of court cases.

When using Excel's Histogram option under the Data Analysis tool,the term bins refers to:

A stem and leaf diagram is used to:

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

A study of 4000 Dell PC customers listed the age of the customer among other variables.The youngest customer was 14 years old and the oldest customer was 84 years old.If analysts for the company wish to develop a frequency distribution with 7 classes,the smallest value that the class width can be is 10 years.

A company has 400 employees.The manager of human resources has recorded the annual salary and wages for each employee.These value range from $17,500 to $67,800.Provide an example of a stem and a leaf that could be developed to describe the distribution of the salary and wage data.

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

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.

When a histogram is constructed for discrete numerical data,there should be spaces between the bars of the histogram.