The table represents data collected on the time spent studying (in minutes) and the resulting test grade.
| Time Spent Studying (min) | 52 | 37 | 31 | 9 | 26 | 40 | 22 | 10 | 45 | 34 | 19 | 60 |
| Grade on Test | 95 | 84 | 72 | 58 | 77 | 86 | 72 | 43 | 90 | 81 | 62 | 98 |
Look back at the data from the New York Marathon.
| Year | Competitors* | Year | Competitors* | Year | Competitors* |
|---|---|---|---|---|---|
| 1976 | 2.1 | 1987 | 22.5 | 1997 | 31.4 |
| 1977 | 4.8 | 1988 | 23.5 | 1998 | 32.4 |
| 1978 | 9.8 | 1989 | 25 | 1999 | 32.5 |
| 1979 | 11.5 | 1990 | 25.8 | 2000 | 30 |
| 1980 | 14 | 1991 | 26.9 | 2001 | 24 |
| 1981 | 14.5 | 1992 | 28.6 | 2002 | 32.5 |
| 1982 | 14.3 | 1993 | 28.1 | 2003 | 35.3 |
| 1983 | 15.2 | 1994 | 31.1 | 2004 | 37.3 |
| 1984 | 14.6 | 1995 | 29 | 2005 | 37.6 |
| 1985 | 16.7 | 1996 | 29 | 2006 | 38.4 |
| 1986 | 20.5 | * in thousands | |||
Use this original data, but update it with the following information so that it is accurate through 2011. (The 2012 NY Marathon was cancelled due to the aftermath of Hurricane Sandy.) Use the entire data set (1976-2011) to answer all parts of Question 2.
| Year | Competitors (in thousands) |
|---|---|
| 2007 | 39.2 |
| 2008 | 37.9 |
| 2009 | 43.7 |
| 2010 | 44.8 |
| 2011 | 46.8 |
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