Frequency, Frequency Tables, and Levels of Measurement · Try It 5

contains the total number of fatal motor vehicle traffic crashes in the United States for the period from 1994–2011.

$$\begin{array}{cccc}\text{Year}& \text{Total Number of Crashes}& \text{Year}& \text{Total Number of Crashes}\\ \text{1994}& \text{36,254}& \text{2004}& \text{38,444}\\ \text{1995}& \text{37,241}& \text{2005}& \text{39,252}\\ \text{1996}& \text{37,494}& \text{2006}& \text{38,648}\\ \text{1997}& \text{37,324}& \text{2007}& \text{37,435}\\ \text{1998}& \text{37,107}& \text{2008}& \text{34,172}\\ \text{1999}& \text{37,140}& \text{2009}& \text{30,862}\\ \text{2000}& \text{37,526}& \text{2010}& \text{30,296}\\ \text{2001}& \text{37,862}& \text{2011}& \text{29,757}\\ \text{2002}& \text{38,491}& \text{Total}& \text{653,782}\\ \text{2003}& \text{38,477}& & \end{array}$$
Answer the following questions:

(a) What is the frequency of deaths measured from 2000 through 2004?
(b) What percentage of deaths occurred after 2006?
(c) What is the relative frequency of deaths that occurred in 2000 or before?
(d) What is the percentage of deaths that occurred in 2011?
(e) What is the cumulative relative frequency for 2006? Explain what this number tells you about the data.

OpenStax, Statistics · §1.3 Frequency, Frequency Tables, and Levels of Measurement · Try It 5