A company produces an electric toothbrush with a life (that time period for which it does not need a major repair) that is normally distributed with a mean of 48 months with a standard deviation of 7 months. The company wants to determine the warranty period for the toothbrush. Any toothbrush that fails within the warranty period will be replaced by the company. What should the warranty period be if the company does not want to replace more than 2% of the toothbrushes under warranty

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

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.

Bag a contains 3 white marveled and 2 marbles bag b contains 6 white marbles and 3 red marbles a person draws one marbles from each bag find the probability that both marbles are white