Mathematics, 12.11.2019 19:31, Yungnaudie

The diameter of steel rods manufactured on two different extrusion machines is being investigated. two random samples of sizes n1 15 and n2 17 are selected, and the sample means and sample variances are s1 2 0.35, and s 2 2 0.40, respectively. assume that 2 1 2 2 and that the data are drawn from a normal distribution. (a) is there evidence to support the claim that the two machines produce rods with different mean diameters? use a p-value in arriving at this conclusion. (b) construct a 95% ci for the difference in mean rod diameter. interpret this interval

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:20, genyjoannerubiera

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

Answers: 2

continue

Mathematics, 21.06.2019 23:00, winnie45

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.

Answers: 1

continue

Mathematics, 22.06.2019 02:40, blake4033

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)

Answers: 3

continue

Mathematics, 22.06.2019 03:20, 21stcenturycyber

The height of a box can be found by dividing its volume by the area of its base, bottom. what is the height of a box that has a volume of 26.35 cubic centimeter and a base area of 4 1/4 square centimeter?

Answers: 1

continue

Do you know the correct answer?

The diameter of steel rods manufactured on two different extrusion machines is being investigated. t...