Table 2.
ADF Test at level and difference 1 for the selected time series data.
| Country | Model type | Transformation | Dickey-Fuller Test | Lag order | P |
|---|---|---|---|---|---|
| United Kingdom | New cases | Level Difference1 |
-1.899189 -17.32530 |
4 4 |
0.3326 ≤0.001∗ |
| Death cases | Level Difference1 |
-1.471263 -6.183466 |
4 4 |
0.8376 ≤0.001∗ |
|
|
| |||||
| South Africa | New cases | Level Difference1 |
-2.485075 -3.920069 |
4 4 |
0.8376 ≤0.001∗ |
| Death cases | Level Difference1 |
-1.471263 -6.183466 |
4 4 |
0.8376 ≤0.001∗ |
|
|
| |||||
| Brazil | New cases | Level Difference1 |
1.523484 -25.18564 |
4 4 |
0.8448 ≤0.001∗ |
| Death cases | Level Difference1 |
-1.448902 -26.38912 |
4 4 |
0.8448 ≤0.001∗ |
|
|
| |||||
| Nigeria | New cases | Level Difference1 |
-0.336076 -14.43101 |
4 4 |
0.9894 ≤0.001∗ |
| Death cases | Level Difference1 |
-2.616215 -14.10239 |
4 4 |
0.2734 ≤0.001∗ |
|