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. 2023 Mar 21;73:102233. doi: 10.1016/j.techsoc.2023.102233

Table 3.

Independent Samples T-Test in countries with high vs. low numbers of mechanical ventilators per 100,000 people.

Levene's Test for equality of variances
 T-test for equality of Means
F Sig. t df Sig.
2-tailed		 Mean Difference Std. Error Difference
Log Mechanical ventilators per 100,000 inhabitants, 2015–2020 (#)

  • •Equal variances assumed

 6.499 0.038 −2.904 7 0.023 −0.852 0.293

  • •Equal variances not assumed

 −3.144 5.959 0.020 −0.852 0.271
COVID-19 Fatality rates %, December 31st, 2020 (§)

  • •Equal variances assumed

 0.161 0.701 3.164 7 0.016 1.024 0.324

  • •Equal variances not assumed

 3.046 5.395 0.026 1.024 0.336
COVID-19 Fatality rates %, February 21st, 2022

  • •Equal variances assumed

 3.319 0.111 0.822 7 0.438 0.220 0.267

  • •Equal variances not assumed

 0.874 6.563 0.413 0.220 0.251

Note:# Log transformation is applied to have a normal distribution of this variable within two groups (§). This value assesses the real effect of mechanical ventilator devices on COVID-19 patients with acute respiratory disorders because it refers to a previous period the roll-out of vaccination campaign between countries, when alternative and effective therapeutic treatments are missing.