26. Latent Fingerprints. Firearms, live ammunition, and spent cartridge casings are often submitted to crime laboratories to be processed for latent fingerprints. B. Maldonado explored the chances of successfully recovering fingerprints in the article, "Study on Developing Latent Fingerprints on Firearm Evidence" (Journal of Forensic identification, Vol. 62, Issue 5, pp. 425-429). The following table provides a frequency distribution for the type of evidence submitted to crime laboratories over a 2-year period at the Denver Police Department.

Evidence	Frequency
Firearm	289
Magazine	161
Live Cartridge	2727
Spent Cartridge Casing	259

a. Obtain a relative-frequency distribution.
b. Draw a pie chart.
c. Construct a bar chart.
d. Interpret your results.

To obtain a relative-frequency distribution with given data.

In a dot plot, a dot is placed above the corresponding number on the number line for each set of data. Obtained a relative-frequency distribution as:

As a result, a relative-frequency distribution is obtained.

To draw a pie chart with given data.

The number of data values that fall into a class is known as frequency. Draw a pie chart as follows:

As a result, the pie chart is obtained.

To construct a bar chart with given data.

The number of data values that fall into a class is known as frequency.
Construct a bar chart as follows:

To interpret the results with given data.

Since the group corresponds to the greatest slice in the pie chart and the highest bar in the bar chart, the most of evidence comes from live cartridge.