Table 10.

Paired sample t-test statistics.

Attributes	Average values of user perception ratings before COVID-19	Standard Deviation	Average values of user perception ratings after COVID-19	Standard Deviation	t statistics	degree of freedom	std error of difference	p value
a1	4.5	0.52	3.8	0.91	16.27	1118	0.043	0.0001
a2	4.5	1.01	3.5	1.02	16.28	1118	0.061	0.0001
a3	5.2	0.77	5.1	0.9	1.997	1118	0.05	0.0461
a4	4.6	0.79	4.4	0.92	3.9	1118	0.051	0.0001
a5	4.2	0.81	3	1.1	21.0261	1118	0.057	0.0001
a6	3.5	0.73	3.2	0.62	7.2225	1118	0.042	0.0001
a7	3.5	0.62	5.6	0.54	59.00079	1118	0.036	0.0001
a8	4.5	0.86	5.5	0.84	19.39	1118	0.052	0.0001
a9	4.2	0.53	5.7	0.83	36.846	1118	0.041	0.0001
a10	5.5	0.76	5.6	0.46	2.536	1118	0.039	0.013
a11	4.2	0.62	4.4	0.84	4.584	1118	0.044	0.0001
a12	4.6	0.73	3.5	0.26	31.262	1118	0.035	0.0001
a13	4	0.78	3.5	0.73	10.874	1118	0.046	0.0001
a14	4.5	0.56	3.7	0.85	18.97	1118	0.042	0.0001
a15	5.3	0.6	4.5	0.57	22.486	1118	0.036	0.0001
a16	6	0.73	6.2	0.82	4.295	1118	0.047	0.0001
a17	6.5	0.62	6.7	1.09	3.889	1118	0.51	0.0001
a18	4.5	0.87	4.7	0.53	4.425	1118	0.045	0.0001
a19	4.5	0.69	4.7	0.77	4.558	1118	0.044	0.0001
a20	6.5	0.57	6.4	0.84	2.372	1118	0.042	0.0178
a21	4.6	0.63	4.5	0.72	2.468	1118	0.041	0.0137
a22	4.7	0.57	5.5	0.76	20.128	1118	0.04	0.0001