Acomputer undergoes downtime if a certain critical component fails. this component is known to fail at an average rate of once per four weeks. no significant downtime occurs if replacement components are on hand because repair can be made rapidly. there are two replacement components on hand, and ordered replacements are not due for six weeks. (a) what is the probability of significant downtime occurring before the ordered components arrive? (b) if the shipment is delayed two weeks, what is the probability of significant downtime occurring before the shipment arrives?

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.