On the Stochastic Restricted 𝑟-𝑘 Class Estimator and Stochastic Restricted 𝑟-𝑑 Class Estimator in Linear Regression Model

Table 1

Total Research and Development Expenditures as a percent of Gross National Product by Country: 1972–1986.

Year	𝑌	𝑋1	𝑋2	𝑋3	𝑋4
1972	2.3	1.9	2.2	1.9	3.7
1975	2.2	1.8	2.2	2.0	3.8
1979	2.2	1.8	2.4	2.1	3.6
1980	2.3	1.8	2.4	2.2	3.8
1981	2.4	2.0	2.5	2.3	3.8
1982	2.5	2.1	2.6	2.4	3.7
1983	2.6	2.1	2.6	2.6	3.8
1984	2.6	2.2	2.6	2.6	4.0
1985	2.7	2.3	2.8	2.8	3.7
1986	2.7	2.3	2.7	2.8	3.8