Math 107 Coursework Example | Topics and Well Written Essays - 750 words

Math 107 - Coursework Example Thus, this design helps control for some lurking variables and avoids problems with confounding. 10) The actual adults satisfied with their jobs= 54% * 1581 =854 adults. From this, the 95% confidence interval is 44% to 86%. This confidence interval in consistent with the national poll result of the significance test indicated, but is more informative since it gives a range of values for the true proportion of adults 12) Double-blind is a stringent way of conducting an experiment on human subjects in order to eliminate subjective bias on both experimental group and the experimenters. More than not, double-blind experiments are employed to achieve a higher standard of scientific rigor. In this method,  neither the subjects nor the researcher knows who belongs to a control group and who belongs to an experimental group. Thus, performing the experiment in a double-blind way is used to lessen the influence of individual prejudices and unintentional physical cues on the results of the experiment. In medical studies, double-blind methods applied since there is always the possibility that the study results would be affected by conscious and unconscious bias by the experimenter. 16) In trying to make a weighted voting system that works, one first notices that the chair and vice chair actually have the same power (given the rule), so they are given the same weight (say, 5). The other three members also have the same weight, say 3 (two members must weigh more than of the chairs). Then the quota would have to be smaller than or equal to 13 (for the two chairs plus one other member to win), smaller than or equal to 11 (for one of the chairs plus two members to win), and larger than 10 and 9 (so that the two chairs alone, or the three members alone, cannot win). Thus it looks like 11 works here; indeed, the weighted voting system [11:5, 5, 3, 3, 3] is equivalent to the