Table 2.

Results of the 15-days-ahead forecasts for the cumulative number of infected cases (in millions) of COVID-19 in India using the Gompertz and ARIMA models.

	Gompertz growth model			ARIMA model
Date	Lower CI	Measured	Upper CI	Lower CI	Measured	Upper CI
21 December 2020	6.48	6.51	6.53	10.12	10.13	10.14
22 December 2020	6.49	6.51	6.54	10.14	10.15	10.18
23 December 2020	6.49	6.52	6.54	10.15	10.17	10.21
24 December 2020	6.50	6.52	6.55	10.16	10.19	10.24
25 December 2020	6.51	6.53	6.55	10.17	10.21	10.28
26 December 2020	6.51	6.54	6.56	10.19	10.23	10.32
27 December 2020	6.52	6.54	6.56	10.20	10.25	10.35
28 December 2020	6.52	6.55	6.57	10.21	10.27	10.39
29 December 2020	6.53	6.55	6.58	10.22	10.29	10.43
30 December 2020	6.53	6.56	6.58	10.22	10.31	10.47
31 December 2020	6.54	6.56	6.59	10.23	10.33	10.51
1 January 2021	6.54	6.57	6.59	10.24	10.35	10.55
2 January 2021	6.55	6.57	6.59	10.25	10.36	10.60
3 January 2021	6.55	6.58	6.60	10.25	10.38	10.65
4 January 2021	6.56	6.58	6.60	10.26	10.40	10.70