please answer both parts a and b within 30 minutes. The postmaster of a small western town receives a certain number of complaints each day about mail delivery.DAY75Number of complaintsUCLLCLb. Is the process in control?1Ⓒ YesO No4211316485966a. Determine three-sigma control limits using the above data. (Round your intermediate calculations to 4 decimal placesand final answers to 3 decimal places. Leave no cells blank - be certain to enter "0" wherever required. Round up any negativecontrol limit value to zero.)8 912 1410 11 12 13 1476 4 2 9

We will calculate the 3 sigma control chart to conclude that the process is in under control or not…

Answered: a. Determine three-sigma control limits…

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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The Big Black Bird Company produces fiberglass camper tops. The process for producing the tops must be controlled so as to keep the number of dimples low. When the process was in control, the defects shown to the right were found in 10 randomly selected camper tops over an extended period of time. a. Assuming 10 observations are adequate for this purpose, determine the three-sigma control limits for dimples per camper top.
A person read that the average number of hours and adult sleeps on Friday night to Saturday morning was 7.3 hours. The researcher feels that college students do not sleep 7.3 hours on average. The researcher randomly selected 17 students and found that on average they slept 8.5 hours. The standard deviation of the sample is 1.4 hours. At (alpha) = 0.01, is there enough evidence to say that college students do not sleep 7.3 hours on average? Assume that the population is approximately normally distributed. Use the critical value method and tables. A. State the hypotheses and identify the claim with the correct hypothesis. B. Find the critical value(s). C. Compute the test value. D. Make the decision. E. Summarize the results.
An inventor, working at a science tech lab, believes innovations in satellites are increasing. The inventor would like to test the claim that the average number of new ideas for satellite development per month at the science tech lab is over 60 new ideas. Using the computed test statistic of 1.05 and the critical value of 1.28, is there enough evidence for the inventor to reject the null hypothesis? Use the graph below to interpret the critical value. First select the appropriate test type (left-, right-, or two- tailed), then plot the points along the x-axis (for the critical value and test statistic), and use them to choose the appropriate interpretation.
Recently, a simple random sample of 572 adult males showed that 124 of them smoke. It has been established that in 2008. 20.4% of adults smoke. Use a 0.05 significance level to test the claim that the rate of smoking by adult males is now the same as in 2008. What is the value of the critical z tabular value?
A simple random sample of 49 accounts is taken from an account receivablesportfolio of XYZ Ltd and the average account balance is $630. The population standarddeviation σ is known to be $60. Test the hypothesis that the population mean accountbalance is greater than $620 at α = 0.05
A quality control expert at a local dairy claims that its cartoons contain more than 64oz of milk a sample of 15 cartoons reveals a mean of 65 and 1.1 oxs respectively. At the 1% level, does the appropriate hypothesis support his claim? find and interpret the p value
A builder claims that bidets are installed in 70% of all homes being constructed today in suburban Lapu-lapu. Would you agree with this claim if a random survey of new homes in this city showed that 80 out of 150 had bidets installed? Use a 0.10 level of significance. What is the critical value?
You are calculating control limits for a p-chart, and your boss tells you to use “2.7 Sigma limits”. What is the false alarm rate in this situation (assuming a two-tail situation)?
The Office of the University Registrar of Seoul University would like to know if the degree programs in College of Science and Math are equally preferred by students.The test claim that the proportions of the students enrolled are equal in each degree program at alpha=0.05 Using the data on the number of currently enrolled students in each gender (M of F) in each of the four degree programs, fill out the table below and find the: a. Chi-square critical Value b. Chi-square test statistic
In an area where there is no radioactive fallout, 1% of newborns show genetic disorders. Genetic disorders were observed in 150 out of 10000 babies born in a year in a region with radioactive fallout as a result of atomic bomb trials.Test whether radioactive fallout increases the rate of genetic defects at α = 0.05 significance level.
A random sample of 10 size AA batteries for toys yield a mean of 2.87 hours with standard deviation, 0.69 hours. Find the critical value, t*, for a 99% CI and the margin of error for a 99% CI. Give both to 3 decimal places.
A researcher reports an F-ratio with dfbetween=2 and dfwithin=30 for an independent-measures ANOVA.

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