Statistics Assignment Example | Topics and Well Written Essays - 500 words - 2

Statistics - Assignment Exampleof industrial explosion and were under maturate 40 at the time of accident had heightened concentrations of dioxin in their blood and that each tenfold increase in dioxin level was associated with a doubling of the risk of breast cancer.a) In any experiments, it is required to select consume randomly. If the subjects were non assigned to the sustenances randomly instead of letting people pick what they wanted to run down, than there may be possibility of adding an other(a) factor (in this case subjects choice) introduced to the experiments. Thus, it will be ticklish to say which factor influenced blood obligate more effectively, subjects choice what they wanted to eat or diet type.Randomization allows us to equalize the effects of unknown or uncontrollable sources of variation. It does not eliminate the effects of these sources, but it spreads them out across the treatment levels so that we can see other(prenominal) them.c) The researchers need the control group because than they will be able to compare the blood pressure of groups base on different diet only. If the DASH diet groups mean blood pressure was lower at the end of the experiment than at the beginning that would only mean that DASH diet lowered the blood pressure. This will not mean how much effective DASH diet is compared to other diets. Further, in an experiment it is required to control sources of variation other than the factors we are testing by reservation conditions as similar as possible for all treatment groups.d) We would need additional information trite error of difference (or sample standard deviations and sizes for DASH diet group and control group) in aver to decide whether an average reduction in blood pressure of 6.7 points was statistically