Refer to the data in Exercise 11.44. The student with 14 years of experience with a starting salary of $ 97,900 was hired by a family business. In return for a low starting salary, the student received a large equity share in the firm.
a. Would the data value associated with this student be considered a high leverage or a high influence data value?
b. Would the slope increase or decrease if this point was removed from the analysis?
c. In which direction (larger or smaller) would the removal of this data point change the residual standard deviation?
d. How would the removal of this data point change the correlation?
In exercise

EXPER85 51 4 3 330 13 14 10 2 SALARY 113.9 112.5 109 1251 116 112.7 104.5 100.1 1011 126.9 97.9 1135 98.3 EXPER 2 5 13 1 5 15 57 4 3 3 7 SALARY 97.2 111.3 124.7 105.3 107 103.8 1074 100.2 1128 100.7 107.3 103.7 1218 EXPER 796 6 4 65 1 13 1 624 SALARY 111.7 116.2 108.9 119 96.1 113.5 1104 987 120.1 98.9 108.4 110.6 1018 EXPER15 42 7511 0 6 SALARY 104.4 106.6 103.9 105 979 104.6 106.9 1076 103.2 1016 99.2 1017 120.1