Suppose a RADAR for aircraft detection works properly with probability 0.9 (working prop-erly means the RADAR alarms if an aircraft is present and does not alarm if an aircraft isnot present). It is observed that RADARs fail independently of each other (failing means theRADAR alarms if an aircraft is not present and does not alarm if an aircraft is present).
You want to improve the reliability of such a RADAR. You build a super-RADAR system having5 RADARs in parallel, and a logic circuit that makes the decision based on majority vote, i.e., it alarms if at least 3 radars alarm and does not alarm if at least 3 radars do not alarm.
What is the probability that your super-RADAR works properly?

Find the solution(s) to x^2-14+49=0

What is fraction that is equivalent to 3/8

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.