# Question: Two extrusion machines that manufacture steel rods are being compared

Two extrusion machines that manufacture steel rods are being compared. In a sample of 1000 rods taken from machine

a. 960 met specifications regarding length and diameter. In a sample of 600 rods taken from machine

b. 582 met the specifications. Machine B is more expensive to run, so it is decided that machine A will be used unless it can be convincingly shown that machine B produces a larger proportion of rods meeting specifications.

a. 960 met specifications regarding length and diameter. In a sample of 600 rods taken from machine

b. 582 met the specifications. Machine B is more expensive to run, so it is decided that machine A will be used unless it can be convincingly shown that machine B produces a larger proportion of rods meeting specifications.

**View Solution:**## Answer to relevant Questions

The following 11-84 Plus calculator display presents the results of a hypothesis test for the difference between two means. The sample sizes are n1 = 18 and n2 = 16. a. Is this a left-tailed test, a right-tailed test, or a ...Null hypothesis: Let p0 be the probability that a family with four children has no boys, p 1 be the probability that a family has one boy, and so on. The null hypothesis is that the number of boys in a four- child family ...Expected frequencies: Compute the expected frequencies. A hypothetical sample of 200 families, each with four children, was selected, and the number of boys was recorded for each. The results are presented in the following ...Why do large values of x2 provide evidence against H0? Why donâ€™t small values of x2 provide evidence against H0? The following MINITAB output presents the results of a test of the null hypothesis Ho: A = 0. a. What are the slope and intercept of the least-squares regression line? b. Can you conclude that x is useful for predicting y? ...Post your question