The U.S. Department of Transportation introduced a new female crash dummy as it seeks to step up safety for women, who face a higher injury risk in car crashes than men. The U.S. government has used a ...

In the Two-Sample Test for Proportions task, you can determine whether two probabilities are the same. The data analyzed in this example are taken from a study measuring the accuracy of two computer ...

Incorrect. This is the proportion of people who tested positive in the first place who are reached by the system. In the week to 5 August 79.7% of people who were referred to the service after testing ...

The NHS Test and Trace system has reached the lowest ever proportion of contacts of people who tested positive for Covid-19 in England. Four in 10 close contacts of people who tested positive are ...