Question: Use the following data (NCHS 2005) to determine whether or not there is a linear relation between the U.S. national health expenditures as a percent of gross domestic product (GDP) and time.

Year National Health

Expenditure as percentage of GDP

1960 5.10

1970 16.18

1980 14.94

1990 12.31

1995 12.35

1997 13.73

1998 9.62

1999 8.19

2000 10.86

2001 8.00

2002 11.68

1. Using the output what can you conclude and why? (2 points)
2. What is your predicted value for national health expenditures as a percent for 2010? (1 points)
3. What is the 95% confidence interval for your estimate? (Extra Credit: 3 points)
4. What data have you used as the basis of your prediction? (2 points)
5. What assumptions have you made about your prediction? (2 points)

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