In October 2020, six scholars published the Covid-19 basic reproduction number (R0) for Sri Lanka in the Virology Journal. As is well known, if this number is greater than one, Covid-19 is out of control. They obtained three data-points for R0: 1.02, .8 and 1.1. Based on this data, test whether the mean of R0 is significantly different from one? Use a significance level of 10 per cent, and assume that the RO follows the normal distribution.

Group of answer choices

The calculated test statistic is -0.297 and the critical values are -2.92 and 2.92 so we fail to reject that the mean of R0 is one

The calculated test statistic is 0.675 and the critical values are -2.92 and 2.92 so we reject that the mean of R0 is one

The calculated test statistic is -0.297 and the critical values are - 2.353 and 2.353 so we fail to reject that the mean of R0 is one

The calculated test statistic is 11.926 and the critical values are -2.353 and 2.353 so we reject that the mean of R0 is one