
Interpretation: The average maximum area of the ozone hole between the years 2005-2009, 2000-2004, and 1995-1999 needs to be determined from the given data.
Concept Introduction: From a given data, the average value can be calculated by adding all the values between the range divided by the number of entries.
For example, the average of two values can be estimated as follows:
According to the given plot, the area of the ozone hole between the years 2005 and 2009 is as follows:
Year | Ozone hole area |
2005 | 24.7 |
2006 | 27.5 |
2007 | 24.3 |
2008 | 25.0 |
2009 | 23.7 |
The average value can be calculated as follows:
Thus, the average maximum area of an ozone hole between the years 2005 and 2009 is 25.04
Similarly, the area of the ozone hole between the years 2000 and 2004 is as follows:
Year | Ozone hole area |
2000 | 28.7 |
2001 | 24.8 |
2002 | 18.0 |
2003 | 27.6 |
2004 | 19.6 |
The average value can be calculated as follows:
Thus, the average maximum area of an ozone hole between the years 2000 and 2004 is 23.74
Now, the area of the ozone hole between the years 1995 and 1999 is as follows:
Year | Ozone hole area |
1995 | 22.1 |
1996 | 23.0 |
1997 | 22.1 |
1998 | 26.6 |
1999 | 23.1 |
The average value can be calculated as follows:
Thus, the average maximum area of an ozone hole between the years 1995 and 1999 is 23.38
Chapter 1 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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