6.28. Control charts for I and R are maintained on aprocess. After 20 preliminary subgroups each of size3 are evaluated, you have the following data:2020Σ1502 ΣR =60i=li=1(a) Set up the control charts using these data.(b) Assume that the process exhibits statistical con-trol. Estimate the process mean and standarddeviation.(c) Suppose that the quality characteristic is nor-mally distributed with specifications at 275 ± 6.Estimate the fraction nonconforming producedby this process.(d) How much reduction in process variability wouldbe required to make this a Six Sigma process?

Answered: Image /qna-images/answer/0b655209-3d3b-4056-8744-e60f99225446.jpg

Answered: 6.28. Control charts for I and R are…

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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[4-5] CONSIDER that the data is UNCORRELATED use alpha .05. Provide the following: CI of the F value Statistical Interpretation
Suppose μ1 and μ2 are real average stopping distances at 50 mph of a certain type of car equipped with two different types of braking systems. Use the two-sample t test at the 0.01 significance level to test H0: (μ1 - μ2 = -10) vs. Ha: (μ1 - μ2 < -10) for the following data: m = 6 ; x̄ = 115,7 ; s1 = 5,03 ; n = 6 ; ȳ = 129,3 and s2 = 5,38 . Using the above data and calculating a 95% CI for the difference between the actual average stopping distance of cars equipped with brake system 1 and cars with brake system 2. The calculated range suggests that accurate information about the value of this difference is available? From this information, it is possible to mark the alternative as correct: a) The calculated range is (-13.50, -11.80). With this range, even with values so close, it is not possible to say that precise information is available. b) The calculated range is (-20.40, -6.80). With this interval, even being so wide, it is possible to affirm that accurate information is…
Find the t value that forms the boundary of the critical region in the right-hand tail for a one-tailed test with a alpha = .01 for each of the following sample sizes. a. n = 10b. n = 20c. n = 30
Suppose a linear model y=β0+β1xy=β0+β1x is fit to a sample data set, and a test of the null hypothesis H0:β1=0H0:β1=0 against an alternative hypothesis HA:β1≠0HA:β1≠0 is performed; a PP-value of 0.4203 is obtained. Which of the following scatter plots depicts the data set on which this model was fit and the hypothesis test was performed?
A researcher examined number of monthly meetings (2 or 4) on job satisfaction. If the t obtained for a correlated groups t-test was 2.50, df = 3, and the t critical = 2.353, what should s/he conclude?
For nos. 29 to 32.Mr. Juan Rafael, the manager of JJ Computer Tech is conducting a study on the number of customers who pay by personal check, by credit card and by debit card. During the course of five days, he records the following number of purchases made by each method. 29. What is the grand total of all the observations?A. 121B. 153C. 205D. 47930. What is the critical F value at a 5% significance level?A. 0.13B. 3.08C. 3.89D. 7.6531. What is the F-computed value?A. 7.65B. 3.89C. 3.08D. 0.1332. What should be the conclusion as a result of the analysis?A. The number of customers who pay by personal check, by credit card, and by debit card at JJ Computer Tech are the same.B. At least two of the methods of payment in purchasing at JJ Computer Tech are significantly different.C. There is a significant difference in the number of customers who pay by personal check, by credit card, and by debit card at JJ Computer Tech.D. There is no significant difference in the number of customers who…
Assume that as a portfolio manager the beta of your portfolio is 1.15 and that your performance is exactly on target with the SML data under condition 1. If the true SML data is given by condition 2, how much does your performance differ from the true SML? (1) RFR = 0.0625 Rm(proxy) = 0.12 (2) RK = 0.078 Rm(true) = 0.10
1. Calculate the Variance for each lake 2. Plug values into the t-test equation and find 'calculated t' 3. Determine the df and look up 'critical t' with a p-value of 0.05
A dietitian wishes to see if a person’s cholesterol level will be changed if the diet is supplemented by a certain mineral. Four subjects were pre-tested, and they took the mineral supplement for a 6-week period. The results are shown in the table. Is there sufficient evidence to conclude that the population mean of cholesterol levels has been changed after six weeks at α=0.2α=0.2? Assume that the differences are from an approximately normally distributed population. Subject Cholestrol Level (mg/dl) Cholestrol Level after 6 Weeks (mg/dl) dd ¯dd¯ (d−¯d)2(d-d¯)2 1 206 217 11 2 219 184 -35 3 202 204 2 4 213 205 -8 Total -30 a) Calculate the mean, the sum of the squared deviation from the mean, and the standard deviation of differences. Do not include the unit for each answer: ¯d=d¯= (do not round) ∑(d−¯d)2=∑(d-d¯)2= (do not round) sd=sd= (rounded to one decimal place) b) Perform the hypothesis test in the following steps: Step 1.…
You want to run a 1-tailed independent t-test on sample 1 (M = 32.2, SD = 1.7) and sample 2 (M = 35.6, SD = 1.8), which each have sample size = 8. You have set Alpha = 0.01. What is your t_crit?
Let X1,...,Xn be an iid sample from f(x | θ) = θ xθ−1, 0 < x < 1, where the parameter θ is positive. Find the MLE and MOM estimators for θ
Let X1, . . . , Xn be an iid sample from f(x | θ) = θxθ−1 , 0 < x < 1, where the parameter θ is positive. Find the MLE and MOM estimators for θ.

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