A new process has been developed for applying photoresist to 125-mm silicon wafers used inmanufacturing integrated circuits. Ten wafers were tested, and the following photoresistthickness measurements (in angstroms × 1000) were observed: 13.3987, 13.3957, 13.3902,13.4015, 13.4001, 13.3918, 13.3965, 13.3925, 13.3946, and 13.4002. (For your convenience,we have calculated sample mean: 13.4 and sample standard deviation: 0.0039. You can usethem directly.)(a) Test the hypothesis that mean thickness is 13.4 × 1000 Å. Use a = 0.2 and assume a two-sided alternative.(b) Find a 90% two-sided confidence interval on mean photoresist thickness. Assume thatthickness is normally distributed.

Answered: Image /qna-images/answer/5015184a-e801-40e9-a387-ab0cd8ce4b26.jpg

Answered: A new process has been developed for…

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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A sample of birth weights of 38 girls was taken. Below are the results (in g): 4002.7 3558.2 31 3104.4 3405.2 3094.4 3145.7 2903.5 3641.1 3530.4 2348.2 3027.4 3542.7 2151.5 3583.6 3280.3 4072.1 2989.5 3595.1 2444.4 3537.2 1969 3720.5 3440.5 3395.8 3323.1 3475.6 3159.5 3099.8 3070.7 2838.1 2997.8 2584 2577 2850.5 2995.6 2940.9 3845.8 3173.6 (Note: The average and the standard deviation of the data are respectively 3168.8 g and 480.8 g.) Use a 1% significance level to test the claim that the standard deviation of birthweights of girls is less than the standard deviation of birthweights of boys, which is 510 g. Procedure: Select an answer Assumptions: (select everything that applies) Population standard deviation is unknown The number of positive and negative responses are both greater than 10 O Population standard deviation is known Normal population Sample size is greater than 30 Simple random sample
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Assume that the helium porosity (in percentage) of coal sample taken from any particular sean is normally distributed with a true standard deviation of 0.77 how large a sample size is necessary if the width of the 95% internal is to by 0.348 A) 75 B) 76 C) 80 D) 79
1. Calculate Cp, Cpk, Pp, and Ppk values for each case. Recommended actions for improving the process and the difficulty in achieving those improvements (hard or easy). Candidate actions for improving the process are: centering the process in the spec, reducing between-subgroup variation, and reducing within-subgroup variation. a. = 100.2, ☎within 1.8, total = 2.5, and USL/LSL = 100 ± 8 10400, within = 230, ☎total = 440, and LSL = 9000 35.5, within 2.2, ☎total = 3.4, and USL/LSL 1.4, and USL/LSL b. û c. μ d. = 254, within = 1.2, ☎ total = = 35±5 = 250 ± 10 =
Draw the appropriate picture and use the t-table, to find each of the following: a. The area to the left of 2.571 in the t distribution with 5 degrees of freedom. b. The area to the right of – 1.314 in the t distribution with 27 degrees of freedom. c. The area between – 2.390 and 1.671 in the t distribution with 60 degrees of freedom.

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