Mathematics, 02.12.2020 17:00, mjwickman8751
Let X and Y equal the concentration in parts per billion of chromium in the blood for healthy persons and for persons with a suspected disease, respectively. Assume that the distributions of X and Y are normal. A sample of 8 observations for X have a sample mean of 15.75 and a sample variance of 46.21. A sample of 10 observations of Y have a sample mean of 23.3 and a sample variance of 92.68. Find a 90% confidence interval for the ratio of variances,
Answers: 3
Mathematics, 21.06.2019 21:30, amesha62
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Mathematics, 22.06.2019 01:00, sierraseideman1023
X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20
Answers: 3
Let X and Y equal the concentration in parts per billion of chromium in the blood for healthy person...
Social Studies, 28.09.2019 19:50
Mathematics, 28.09.2019 19:50
Social Studies, 28.09.2019 19:50
Social Studies, 28.09.2019 19:50
Mathematics, 28.09.2019 19:50