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Exam 2: Graphs,charts and Tablesdescribing Your Data

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Question 1

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It is often a good idea to convert frequency distributions to relative frequency distributions when you wish to compare two distributions with different amounts of data.

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Question 2

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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.

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Question 3

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

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.

A frequency histogram should be computed from which type of data?

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 data in this case would most likely be analyzed using a frequency distribution with the data grouped into classes such as 0-2,3-5,6-8,etc.

A bar chart is the same as a histogram.

In constructing a histogram for a joint frequency distribution,the histogram will have the most meaning for the decision maker if there are no gaps between the bars on the histogram.

Frequency distributions are specifically for analyzing discrete data.

A stem and leaf diagram is most similar to a bar chart.

At a manufacturing plant workers are divided into 4 different teams that rotate shifts.The number of units produced by each team is recorded.The best type of chart to display the data is a:

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.

A stem and leaf diagram is an alternative to using:

Explain what information can be conveyed by a frequency histogram.

An ogive is a graph that shows cumulative relative frequency.

Why should a histogram contain no gaps between the bars but a bar chart may have gaps?

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?

The Wilson company monitors customer complaints and organizes these complaints into six distinct categories.Over the past year,the company has received 534 complaints.One possible graphical method for representing these data would be a histogram.

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.

Recently a study of fans attending the New York Mets baseball games was conducted and 500 fans were surveyed.In forming a frequency distribution of the number of miles fans traveled from home to the stadium,it was found that 247 fans traveled between 0 and 5 miles.Based on this information what was the relative frequency for this class?