Mathematics, 22.01.2021 01:10, janeou17xn
A recent increase in sales of microchips has forced a computer company to buy a new processing machine to help keep up with demand. The builders of the new machine claim that it produces fewer defective microchips than the older machine. From a random sample of 90 microchips produced on the old machine, 5 were found to be defective. From a random sample of 83 microchips produced on the new machine, 3 were found to be defective. The quality control manager wants to construct a confidence interval to estimate the difference between the proportion of defective microchips from the older machine and the proportion of defective microchips from the new machine. Why is it not appropriate to calculate a two-sample z-interval for a difference in proportions? The microchips were not randomly assigned to a machine. The microchips were not randomly assigned to a machine. A There is no guarantee that microchips are approximately normally distributed. There is no guarantee that microchips are approximately normally distributed. B The normality of the sampling distribution of the difference in sample proportions cannot be established. The normality of the sampling distribution of the difference in sample proportions cannot be established. C Both sample proportions are less than 0.10. Both sample proportions are less than 0.10. D The sample sizes are not the same.
Answers: 2
Mathematics, 21.06.2019 21:20, thakidd4567
Find the missing variable for a parallelogram: a = latex: 28in^2 28 i n 2 h = b = 6.3 in (1in=2.54cm)
Answers: 3
Mathematics, 21.06.2019 22:30, verdolaga2017me
Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.
Answers: 1
Mathematics, 21.06.2019 23:10, alemorachis49
You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?
Answers: 2
A recent increase in sales of microchips has forced a computer company to buy a new processing machi...
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