You conclusion is different from reality by chance and a small sample size. Cool-aide is a fruit drink made from flavour crystals mixed with water. If it is too dilute it is very difficult to tell the difference between cool-aide and pure water. Contamination occurs in a trial when the people receiving the intervention have contact with those in the control group or some outside group that influence the behaviour of individuals in the control group towards behaviour similar to those in the intervention group. This type of contamination artificially dilutes the effect of the intervention and may lead to a type two error.
Transparency refers to the detailed information provided about the methods and process used.
Another researcher should be able to replicate the study since enough detail about methods used to do the study is provided to be able to repeat the study and arrive at similar conclusions. Stating statistical significance in another way it tells us the possibility of the difference to have occurred by chance alone. A 0.05 confidence level suggests that 19 times out of twenty the finding of the difference between the two groups is correct and one time in twenty the finding is by chance alone. This course is taught by the Department of Family and Community Medicine. All contents copyright , 1998.