Mathematics, 16.12.2019 10:31, Fireburntbudder
Aclinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. before treatment, 13 subjects had a mean wake time of 102.0 min. after treatment, the 13 subjects had a mean wake time of 79.4 min and a standard deviation of 21.2 min. assume that the 13 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. what does the result suggest about the mean wake time of 102.0 min before the treatment? does the drug appear to be effective?
Answers: 2
Mathematics, 21.06.2019 18:00, tasnimsas3
Plz a. s. a. p. the table shows the number of male and female contestants who did not win a prize. what is the probability that a randomly selected contestant won a prize, given that the contestant was female? write the probability as a percent. round to the neares tenth, if needed.
Answers: 1
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
Mathematics, 21.06.2019 22:40, zafarm2oxgpmx
Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola
Answers: 2
Aclinical trial was conducted to test the effectiveness of a drug for treating insomnia in older sub...