Mathematics, 07.09.2019 05:30 mdrifraf
Suppose that we know that of the large fish in a lake the species are 40% perch, 35% bass and 25% trout. (a) what is the probability that a random sample of 5 large fish contains 2 perch, 2 bass, and 1 trout? (b) what is the probability that a random sample of 4 large fish will have more trouts than bass?
Answers: 3
Mathematics, 21.06.2019 19:40, evarod
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
Suppose that we know that of the large fish in a lake the species are 40% perch, 35% bass and 25% tr...
History, 02.01.2020 22:31
Mathematics, 02.01.2020 22:31