10.1.4 A polymer is manufactured in a batch chemical process.Viscosity measurements are normally made on each batch, andlong experience with the process has indicated that the variabilityin the process is fairly stable with o = 20. Fifteen batch viscositymeasurements are given as follows:724, 718, 776, 760, 745, 759, 795, 756, 742, 740, 761, 749,739, 747, 742A process change that involves switching the type of catalyst usedin the process is made. Following the process change, eight batchviscosity measurements are taken:735, 775, 729, 755, 783, 760, 738, 780Assume that process variability is unaffected by the catalystchange. If the difference in mean batch viscosity is 10 or less,the manufacturer would like to detect it with a high probability.a. Formulate and test an appropriate hypothesis usingα = 0.10. What are your conclusions? Find the P-value.b. Find a 90% confidence interval on the difference in meanbatch viscosity resulting from the process change.c. Compare the results of parts (a) and (b) and discuss yourfindings.

The observations of viscosity measurement for 15 sampled batches are as follows (the sample size,…

Answered: 10.1.4 A polymer is manufactured in a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Much concern has been expressed regarding the practice of using nitrates as meat preservatives. In one study involving possible effects of these chemicals, bacteria cultures were grown in a medium containing nitrates. The rate of uptake of radio-labeled amino acid (in dpm, disintegrations per minute) was then determined for each culture, yielding the following observations. 7,255 6,875 9,637 6,863 9,098 5,846 8,954 7,979 7,068 7,498 7,882 8,179 7,528 8,728 7,469 Suppose that it is known that the mean rate of uptake for cultures without nitrates is 8,000. Do the data suggest that the addition of nitrates results in a decrease in the mean rate of uptake? Test the appropriate hypotheses using a significance level of 0.10. Find the test statistic and P-value. (Use technology to calculate the P-value. Round your test statistic to two decimal places and your P-value to three decimal places.) t= P-value= State your conclusion. Reject H0. We have convincing evidence that the mean rate of…
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Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain (fruit < vegetables < cereals < nuts < corpse). Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. Independent random samples from two regions gave the following phosphorous measurements (in ppm). Assume the distribution of phosphorous is mound-shaped and symmetric for these two regions. REGION I:X1;N1=15 857 1,551 1,230 875 1,080 2,330 1,850 1,860 2,340 1,080 910 1,130 1,450 1,260 1,010 REGION II:X2;N2=14 538 812 790 1,230 1,770 960 1,650 860 890 640 1,180 1,160 1,050 1,020 (a) Use a calculator with mean and standard deviation keys to verify that x1, s1, x2, and s2. (Round your answers to four decimal places.) x1= ppm s1= ppm x2= ppm s2= ppm…

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