See the attached file forthe formula.
2.12 Table 2-9 gives data on the Consumer Price Index (CPI) for all items (1982-1984=100) and the Standard & Poor's (S&P) index of 500 common stock prices (base of index: 1941-1943=10). Complete letters a through e in the questions that follow the table.
Table 2-9 CONSUMER PRICE INDEX (CPI) AND S&P 500 INDEX (S&P), UNITED STATES, 1978-1989
Year CPI S&P
1978 65.2 96.02
1979 72.6 103.01
1980 82.4 118.78
1981 90.9 128.05
1982 96.5 119.71
1983 99.6 160.41
1984 103.9 160.46
1985 107.6 186.84
1986 109.6 236.34
1987 113.6 286.83
1988 118.3 265.79
1989 124 322.84
a. Plot the data on a scattergram with the S&P index on the vertical axis and CPI on the horizontal axis.
b. What can you say about the relationship between the two indexes? What does economic theory have to say about this relationship?
c. Consider the following regression model:
Use the method of least squares to estimate this equation from the preceding data and
interpret your results.
d. Do the results obtained in part c make economic sense?
e. Do you know why the S&P index dropped in 1988?
The solution provides step by step method for the calculation of regression analysis. Formula for the calculation and Interpretations of the results are also included.