The data below reflects the 1991-92 Reunion Class Giving of SUNY Albany alumni.
Class Year 1922 1927 1932
Average Gift |
Total Giving 41.67 | 125 60.75 1,215 83.82 3,772 87.84 5,710 88.27 6,003 76.14 5,254 52.29 4,393 1937 1947 1952 1957 1962 57.80 4,451 1972 42.68 18,093 1976 49.39 22,473 1981 46.87 20,997 1986 37.03 12,590
We will use the columns "Class Year" and "Average Gift" for all questions, unless otherwise stated.
Part (b) Calculate the least squares line. Put the equation in the form of ý = a + bx. (Round your answers to three decimal places.) ` = 936.892 +-0.449 x O
Part (c) Find the correlation coefficient r. (Round your answer to four decimal places.) r=0.5176 x What does it imply about the significance of the relationship?
a) The value of r is significant: therefore, we can use the equation to make predictions.
b) The value does not make sense because it is within the scope of the model.
c) The value of r is not significant; therefore, we cannot use the equation to make predictions.
d) There is no linear relationship, therefore, we cannot use the equation to make predictions