Exam 2: Graphs, Charts and Tablesdescribing Your Data

A study was recently done in which the brand preference for breakfast cereal was analyzed against the gender of the shopper. The study consisted of 200 male shoppers and 300 female shoppers. Three different cereal brands were considered: A, B, and C. A total of 250 female shoppers preferred brand A, 25 female shoppers preferred brand C. A total of 100 shoppers preferred brand B. The number of male shoppers that preferred brand B was:

The Canyon Water Company collects data on the number of gallons of water consumed during a month for each customer. The production manager has divided the usage into 6 classes. To display these data effectively, she could use which of the following types of graphs to convey information about the water usage?

A line chart is most appropriate for:

A university recently collected data for a sample of 200 business majors. One variable collected was the number of credits left to be taken before graduation. This variable could effectively be displayed using a line chart.

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.

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

If a scatter diagram shows points that are reasonably aligned and are sloping downward from left to right, this implies that there is a negative linear relationship between the two variables.

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.

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

In constructing a scatter diagram:

A major insurance company believes that for drivers between 16 years of age and 60 years of age, the number of accidents per year tends to decrease as age increases. If this is the case, a scatter diagram should show a negative relationship between the two variables.

In creating a frequency distribution for numerical data, describe the steps in choosing the classes.

A scatter diagram can show whether a pair of variables has a strong or weak relationship, and also whether it is linear or curved.

If two variables are graphed on the same line chart, two separate scales are always required.

Bar charts can typically be formed with the bars vertical or horizontal without adversely affecting the interpretation.

Scatter diagrams can be used for either quantitative or qualitative data.

When the Histogram tool in Excel is used to construct a frequency distribution and histogram, the default histogram is in the proper format and will require only that you add appropriate labels.

The Grangeville Power Company has four classifications for its customers. For each customer classification, the company tracks the total amount of electricity used during the year. Which of the following types of graphs would be most appropriate to use?

For the same data, a graph of a relative frequency distribution will look exactly the same as a graph of the frequency distribution.

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