Search

...statistical calculations) and they use all the available data. Now try the following activity. Remember to refer to the example if you get stuck and to check your answers once you have completed the questions. Activity 11: Finding out averages The ages of four children in a family are 4, 6, 8 and 10 years. What is the average age? Find the average of the following data...

...statistically significant increase in the frequency or severity of any adverse effects in the exposed population compared with a control group. The closely related LOAEL, lowest observable adverse effect level, is the level where adverse effects are observed. The guideline value (GV) is then calculated from the TDI as follows: [GV equation left hand side equals right hand...

...Statistics on numbers affected and affected groups. A comprehensive site on all aspects of HIV. CDC national prevention network. A site on treatment. This page has a lot on vaccines. Polio The WHO maintains a regularly updated website on the history and progress of the eradication campaign, and the current global status of polio, and links to specific country data and a...

...Statistical analysis is beyond the scope of this course and would require larger data-sets. Nevertheless, you can carry out some simple comparisons. To do this first identify those individuals who are positive for IgG S-antibodies (titre >4). Then carry out two comparisons. In each case compare the median titre in one group with the median titre in the other. The median...