Below is the life expectancy for an individual born in the United States in certain years. (Source: National Center for Health Statistics) Data Year of Birth Life Expectancy 1930 59.7 1940 62.9 1950 70.2 1965 69.7 1973 71.4 1982 74.5 1987 75 1992 75.7 2010 78.7 1. Decide which variable should be the independent variable and which should be the dependent variable. 2. Draw a scatter plot of the ordered pairs. 3. Calculate the least-squares line. Put the equation in the form of: ^ y= a + bx Find the correlation coefficient. Is it significant? 4 . Find the estimated life expectancy for an individual born in 1950 and for one born in 1982. Use these two points to plot the least-squares line on your graph from (2). 5. Why aren't the answers to part (e) the values on the above chart that correspond to those years? 6. Write hypothesis. Find P-value, decide, and Is there a correlation between the variables? 7. Based on the above data, is there a linear relationship between the year of birth and life expectancy? 8. Are there any outliers in the above data? 9 life 18501. Decide which variable should be the independent variable and which should be the dependent variable. 2. Draw a scatter plot of the ordered pairs. 3. Calculate the least-squares line. Put the equation in the form of: " y= a + bx Find the correlation coefcient. Is it signicant? 4. Find the estimated life expectancy for an individual born in 1950 and for one born in 1982. Use these two points to plot the least-squares line on your graph from (2). 5. Why aren't the answers to part (e) the values on the above chart that correspond to those years? 6. Write hypothesis. Find P-value, decide, and Is there a correlation between the variables? 7. Based on the above data, is there a linear relationship between the year of birth and life expectancy? 8. Are there any outliers in the above data? 9. Using the least-squares line, nd the estimated life expectancy for an individual born in 1850. Does the least-squares line give an accurate estimate for that year? Explain why or why not. .0. What is the slope of the least-squares (best-t) line? Interpret the slope