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Stem-Leaf Display

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A. Develop a stem-and-leaf display

B. Use the stem-and-leaf display to answer the following questions:
? What does the grouping of the data in the stem-and-leaf display tell you about the prices per share for the 30 Dow Jones companies?
? What is the price-per-share range for the majority of the companies?
? How many companies have a price per share of $36?
? What is the most frequently appearing price per share?
? What should be considered a relatively high price per share? What percentage of the companies has a price per share in this range? Which companies have a price per share in this range, and what is the price per share for each?

C. Use the Wall Street Journal or another business applications such as the internet to find the current price per share for each of the 30 Dow Jones Industrial Average companies. Construct a stem-and-leaf display for these data and use the display to comment on any changes in the prices per share since April 2004.

See attached file for full problem description.

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Solution Preview

Please see attached for the stem and leaf plot.

? What does the grouping of the data in the stem-and-leaf display tell you about the prices per share for the 30 Dow Jones companies?

We can see that the majority of the prices per share fall in the 20-50$ range. This is very easy to tell since we can look at the leafs that have the most numbers to see where the big trends are.

? What is the price-per-share range for the majority of the companies?
The price per-share range for the majority of companies is $23-57$

? How many companies have a price per share of $36?

To answer this, we look at the stem of 3 to see how many leaves of 6 there are. There are 2 leaves.

? What is the ...

Solution Summary

The solution uses a stem and leaf display to answer a number of questions on share prices.

$2.19
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Frequency distribution, histogram and stem-and-leaf

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